Curiosities about HUMAN BODY SYSTEMS
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Respiratory System
It is responsible for supplying oxygen to the body and eliminating carbon dioxide, a waste product produced by cells.
Components:
Nose and Nasal Cavity: Where the air is filtered, warmed and humidified.
Pharynx: Common passage for air and food.
Larynx: Contains the vocal cords and connects the pharynx to the trachea.
Trachea: Channel that carries air to the lungs.
Bronchi: Branches of the trachea that carry air to the lungs.
Lungs: Organs responsible for gas exchange (oxygen enters and carbon dioxide leaves).
Alveoli: Small structures in the lungs where gas exchange occurs (oxygen for the blood and carbon dioxide for the air).
Respiratory Process:
Inspiration: Air enters the lungs, carrying oxygen.
Gas Exchange: In the alveoli, oxygen is exchanged for carbon dioxide, which is transported to be eliminated.
Exhalation: Carbon dioxide is expelled out of the body.
publicityDigestive System
It is responsible for processing food, breaking it down into nutrients that the body can absorb and use for energy, growth and repair.
Components:
Mouth: Where food is ingested and the digestion process begins through chewing and the action of saliva.
Esophagus: Channel that transports food from the mouth to the stomach.
Stomach: Where food is mixed with gastric juices, breaking down into simpler substances.
Small Intestine: Main site of absorption of nutrients (vitamins, minerals, carbohydrates, proteins and fats).
Large Intestine: Absorbs water and salts, forming feces.
Liver: Produces bile, which helps with the digestion of fats.
Pancreas: Produces enzymes that help digest food in the small intestine.
Gallbladder: Stores bile produced by the liver, releasing it to the small intestine when necessary.
Cardiovascular System
Its main function is to transport blood, nutrients, oxygen and waste throughout the body, as well as regulate temperature and maintain fluid balance.
Components:
Heart: Pumps blood.
Divided into four chambers (two atria and two ventricles).
The left ventricle pumps oxygenated blood to the body.
The right ventricle pumps deoxygenated blood to the lungs.
Blood vessels: Arteries (take blood from the heart to the body), veins (return blood to the heart), and capillaries (exchange gases and nutrients with tissues).
Blood: Composed of plasma, red blood cells (oxygen transport), white blood cells (defense) and platelets (coagulation).
Circulation:
Pulmonary: Blood goes from the heart to the lungs for oxygenation.
Systemic: Oxygenated blood goes from the heart to the body.
Closed system: Blood constantly circulates within the vessels, without leaving the external environment.
Immune System
Its function is to defend the body against invading microorganisms (viruses, bacteria, fungi).
Features:
Uses specialized cells such as lymphocytes (T and B), macrophages and antibodies.
Divided into:
Innate immunity: General defense, present from birth.
Acquired immunity: Specific defense, developed throughout life (e.g. vaccines).
Examples of defense:
Fever: Response against infections.
Vaccines: Stimulate the production of antibodies.
Antibodies: Proteins that neutralize pathogens.
The lymphatic and immune systems work together to protect the body, ensuring health and internal balance.
publicityLymphatic System
Its function is to transport liquids (lymph), fats and immune cells. Remove waste and maintain fluid balance in the body.
Features:
Composed of lymphatic vessels, lymph, lymph nodes and organs (spleen, thymus).
Works together with the circulatory system.
Filters microorganisms and toxins from body tissues.
Examples of components:
Lymph: Liquid that transports white blood cells.
Lymph nodes: "Filters" that fight infections.
Spleen: Produces and destroys old blood cells.
Thymus: Matures T lymphocytes (immune cells).
Nervous System
Its function is to control and coordinate all body functions, processing stimuli from the environment and generating quick responses.
Main Divisions and Resources:
Central Nervous System (CNS): Formed by the brain and spinal cord, processes information.
Peripheral Nervous System (PNS): Nerves that connect the body to the CNS.
It acts through electrical impulses and neurotransmitters.
Regulates voluntary (movements) and involuntary (heartbeat) actions.
Main components:
Brain: Controls thought, memory, and senses.
Spinal cord: Conducts signals between the brain and the body.
Nerves: Transmit nerve impulses.
Neurons: Cells that process and transmit information.
The nervous system is essential for understanding the environment, making decisions and keeping the body functioning in an integrated way.
Endocrine System
Their function is to produce and release hormones that regulate various body functions, such as growth, metabolism, reproduction and internal balance (homeostasis).
Features:
Formed by endocrine glands, which release hormones directly into the blood.
It acts slowly but lastingly, regulating bodily processes.
Works together with the nervous system to maintain balance in the body.
Main Glands and Hormones:
Pituitary gland (master gland): Controls other glands and produces hormones such as GH (growth).
Thyroid: Regulates metabolism (T3 and T4 hormones).
Pancreas: Produces insulin and glucagon (glucose control).
Adrenals: Release adrenaline and cortisol (stress response).
Ovaries and Testicles: Produce sexual hormones (estrogen, progesterone, testosterone).
The endocrine system is essential for maintaining the body's harmony, regulating vital functions continuously and precisely.
publicityExcretory System
They have the function of eliminating metabolic waste from the body (such as urea and carbon dioxide) and maintaining the body's water and chemical balance.
Composition and Characteristics:
Kidneys: Filter the blood, forming urine.
Ureters: Conduct urine from the kidneys to the bladder.
Bladder: Stores urine.
Urethra: Eliminates urine out.
Regulates the volume of liquids, electrolytes and blood pH.
It works together with other systems, such as the circulatory system.
Examples of processes:
Filtration: Occurs in the nephrons of the kidneys.
Urine formation: Excretion of substances such as urea, salts and water.
Waste elimination: Through urination.
The excretory system is essential for detoxifying the body and maintaining internal balance (homeostasis).
Locomotor System
Its function is to allow movement, support the body, protect internal organs and interact with the environment.
Composition:
Skeletal System: Bones and joints.
Muscular System: Muscles that promote movement.
It works in an integrated way: muscles contract and bones serve as levers.
Provides posture, balance and mobility.
Examples of components:
Bones: Femur (support), skull (protection).
Muscles: Biceps (arm movement), quadriceps (locomotion).
Joints: Knee, shoulder (facilitate movement).
The locomotor system is essential for daily activities such as walking, running and lifting objects.
Sensory System
Its function is to detect, process and respond to environmental stimuli, ensuring perception and interaction with the external and internal world.
Features:
Made up of sense organs (vision, hearing, touch, smell, taste).
It connects to the nervous system to transmit information to the brain.
Responds to physical, chemical and thermal stimuli.
Bodies and examples:
Vision (Eyes): Detect light and images (e.g. retina).
Hearing (Ears): Capture sounds and help with balance (e.g. cochlea).
Touch (Skin): Feels pressure, temperature and pain (e.g.: nerve endings).
Smell (Nose): Identifies odors (e.g.: olfactory bulb).
Taste (Language): Recognizes flavors (e.g. taste buds).
The sensory system allows us to explore and understand the world, adapting to different environments.
publicityReproductive System
It is responsible for reproduction, ensuring the perpetuation of the species through the formation of gametes (sex cells) and fertilization.
Male Reproductive System:
Produces sperm (male gametes).
Main bodies:
Testicles: Produce sperm and testosterone.
Penis: Copulatory organ.
Prostate and Seminal Vesicles: Produce fluids that make up semen.
Female Reproductive System:
Main bodies:
Ovaries: Produce eggs and hormones (estrogen and progesterone).
Uterus: Place where the embryo develops.
Vagina: Channel that connects the outside to the uterus.
Examples of processes in the reproductive system:
Ovulation: Release of an egg from the ovaries.
Fertilization: Union of sperm and egg.
Pregnancy: Development of the embryo in the uterus.
The reproductive system is essential for the continuity of life and works in interaction with other systems, such as the endocrine system.
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Respiratory System
It is responsible for supplying oxygen to the body and eliminating carbon dioxide, a waste product produced by cells.
Components:
Nose and Nasal Cavity: Where the air is filtered, warmed and humidified.
Pharynx: Common passage for air and food.
Larynx: Contains the vocal cords and connects the pharynx to the trachea.
Trachea: Channel that carries air to the lungs.
Bronchi: Branches of the trachea that carry air to the lungs.
Lungs: Organs responsible for gas exchange (oxygen enters and carbon dioxide leaves).
Alveoli: Small structures in the lungs where gas exchange occurs (oxygen for the blood and carbon dioxide for the air).
Respiratory Process:
Inspiration: Air enters the lungs, carrying oxygen.
Gas Exchange: In the alveoli, oxygen is exchanged for carbon dioxide, which is transported to be eliminated.
Exhalation: Carbon dioxide is expelled out of the body.publicity
Digestive System
It is responsible for processing food, breaking it down into nutrients that the body can absorb and use for energy, growth and repair.
Components:
Mouth: Where food is ingested and the digestion process begins through chewing and the action of saliva.
Esophagus: Channel that transports food from the mouth to the stomach.
Stomach: Where food is mixed with gastric juices, breaking down into simpler substances.
Small Intestine: Main site of absorption of nutrients (vitamins, minerals, carbohydrates, proteins and fats).
Large Intestine: Absorbs water and salts, forming feces.
Liver: Produces bile, which helps with the digestion of fats.
Pancreas: Produces enzymes that help digest food in the small intestine.
Gallbladder: Stores bile produced by the liver, releasing it to the small intestine when necessary.Cardiovascular System
Its main function is to transport blood, nutrients, oxygen and waste throughout the body, as well as regulate temperature and maintain fluid balance.
Components:
Heart: Pumps blood.
Divided into four chambers (two atria and two ventricles).
The left ventricle pumps oxygenated blood to the body.
The right ventricle pumps deoxygenated blood to the lungs.
Blood vessels: Arteries (take blood from the heart to the body), veins (return blood to the heart), and capillaries (exchange gases and nutrients with tissues).
Blood: Composed of plasma, red blood cells (oxygen transport), white blood cells (defense) and platelets (coagulation).
Circulation:
Pulmonary: Blood goes from the heart to the lungs for oxygenation.
Systemic: Oxygenated blood goes from the heart to the body.
Closed system: Blood constantly circulates within the vessels, without leaving the external environment.Immune System
Its function is to defend the body against invading microorganisms (viruses, bacteria, fungi).
Features:
Uses specialized cells such as lymphocytes (T and B), macrophages and antibodies.
Divided into:
Innate immunity: General defense, present from birth.
Acquired immunity: Specific defense, developed throughout life (e.g. vaccines).
Examples of defense:
Fever: Response against infections.
Vaccines: Stimulate the production of antibodies.
Antibodies: Proteins that neutralize pathogens.
The lymphatic and immune systems work together to protect the body, ensuring health and internal balance.publicity
Lymphatic System
Its function is to transport liquids (lymph), fats and immune cells. Remove waste and maintain fluid balance in the body.
Features:
Composed of lymphatic vessels, lymph, lymph nodes and organs (spleen, thymus).
Works together with the circulatory system.
Filters microorganisms and toxins from body tissues.
Examples of components:
Lymph: Liquid that transports white blood cells.
Lymph nodes: "Filters" that fight infections.
Spleen: Produces and destroys old blood cells.
Thymus: Matures T lymphocytes (immune cells).Nervous System
Its function is to control and coordinate all body functions, processing stimuli from the environment and generating quick responses.
Main Divisions and Resources:
Central Nervous System (CNS): Formed by the brain and spinal cord, processes information.
Peripheral Nervous System (PNS): Nerves that connect the body to the CNS.
It acts through electrical impulses and neurotransmitters.
Regulates voluntary (movements) and involuntary (heartbeat) actions.
Main components:
Brain: Controls thought, memory, and senses.
Spinal cord: Conducts signals between the brain and the body.
Nerves: Transmit nerve impulses.
Neurons: Cells that process and transmit information.
The nervous system is essential for understanding the environment, making decisions and keeping the body functioning in an integrated way.Endocrine System
Their function is to produce and release hormones that regulate various body functions, such as growth, metabolism, reproduction and internal balance (homeostasis).
Features:
Formed by endocrine glands, which release hormones directly into the blood.
It acts slowly but lastingly, regulating bodily processes.
Works together with the nervous system to maintain balance in the body.
Main Glands and Hormones:
Pituitary gland (master gland): Controls other glands and produces hormones such as GH (growth).
Thyroid: Regulates metabolism (T3 and T4 hormones).
Pancreas: Produces insulin and glucagon (glucose control).
Adrenals: Release adrenaline and cortisol (stress response).
Ovaries and Testicles: Produce sexual hormones (estrogen, progesterone, testosterone).
The endocrine system is essential for maintaining the body's harmony, regulating vital functions continuously and precisely.publicity
Excretory System
They have the function of eliminating metabolic waste from the body (such as urea and carbon dioxide) and maintaining the body's water and chemical balance.
Composition and Characteristics:
Kidneys: Filter the blood, forming urine.
Ureters: Conduct urine from the kidneys to the bladder.
Bladder: Stores urine.
Urethra: Eliminates urine out.
Regulates the volume of liquids, electrolytes and blood pH.
It works together with other systems, such as the circulatory system.
Examples of processes:
Filtration: Occurs in the nephrons of the kidneys.
Urine formation: Excretion of substances such as urea, salts and water.
Waste elimination: Through urination.
The excretory system is essential for detoxifying the body and maintaining internal balance (homeostasis).Locomotor System
Its function is to allow movement, support the body, protect internal organs and interact with the environment.
Composition:
Skeletal System: Bones and joints.
Muscular System: Muscles that promote movement.
It works in an integrated way: muscles contract and bones serve as levers.
Provides posture, balance and mobility.
Examples of components:
Bones: Femur (support), skull (protection).
Muscles: Biceps (arm movement), quadriceps (locomotion).
Joints: Knee, shoulder (facilitate movement).
The locomotor system is essential for daily activities such as walking, running and lifting objects.Sensory System
Its function is to detect, process and respond to environmental stimuli, ensuring perception and interaction with the external and internal world.
Features:
Made up of sense organs (vision, hearing, touch, smell, taste).
It connects to the nervous system to transmit information to the brain.
Responds to physical, chemical and thermal stimuli.
Bodies and examples:
Vision (Eyes): Detect light and images (e.g. retina).
Hearing (Ears): Capture sounds and help with balance (e.g. cochlea).
Touch (Skin): Feels pressure, temperature and pain (e.g.: nerve endings).
Smell (Nose): Identifies odors (e.g.: olfactory bulb).
Taste (Language): Recognizes flavors (e.g. taste buds).
The sensory system allows us to explore and understand the world, adapting to different environments.publicity
Reproductive System
It is responsible for reproduction, ensuring the perpetuation of the species through the formation of gametes (sex cells) and fertilization.
Male Reproductive System:
Produces sperm (male gametes).
Main bodies:
Testicles: Produce sperm and testosterone.
Penis: Copulatory organ.
Prostate and Seminal Vesicles: Produce fluids that make up semen.
Female Reproductive System:
Main bodies:
Ovaries: Produce eggs and hormones (estrogen and progesterone).
Uterus: Place where the embryo develops.
Vagina: Channel that connects the outside to the uterus.
Examples of processes in the reproductive system:
Ovulation: Release of an egg from the ovaries.
Fertilization: Union of sperm and egg.
Pregnancy: Development of the embryo in the uterus.
The reproductive system is essential for the continuity of life and works in interaction with other systems, such as the endocrine system.Back