organ system

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Systems of plants and animals

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Organ System Working Together

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Human Body Systems

Szerző: RJ - 08LT - Tomken Road MS (1153)

organ system

Musculoskeletal system

Bones

The internal structure or frame of the body

Muscles

Consists of bundles of long cells called muscle fibres that contain specialized proteins

Ligaments

They are tough, elastic connective tissues that holds bones together at the joints

Circulatory system

Blood vessels

Capilleries

Tiny blood vessels with very thin walls that enables the exchange of gasses, and nutrients

Arteries

It carries blood to your heart

Veins

It carries blood towards your heart

It transports blood to all body parts

Blood

Carries oxygen, and nutrients to all boy parts through blood vessels

Heart

It pumps the blood to all body parts in a constant, and regular beat.

Nervous system

Ganglia

A structure containing a number of nerve cell bodies

Nerves

Fibers of sensory and motor neutrons

Spinal cord

A bundle of nerve fibres and associated tissue that is in close in the spine

Brain

The coordination centre of the sensation, intellectual and nervous activity

Digestive system

Stomach

Its main function is to hold food and the process of digestion, nerves in the stomach signal when we have had enough food

Intestine

It has cells that produces mucus, it contains smooth muscle that contracts and relaxes

Esophagus

It is a muscular tube that contracts and relaxes to allow the food to slide onto the stomach

Mouth

Processes food and breaks it down in two ways chemically: by secreting enzymes ( saliva), and mechanically: using teeth and tongue.

Respiratory system

Diaphragm

Muscle responsible for the contraction of the lungs to allow the air in and out

Alveoli

Allows exchanging of gaseous

Nose/Mouth

Air is inhaled through it

Trachea

Air passes through the two parts of the lungs

Bronchi

The trachea branches off into the bronchi, which delivers the air to the lungs

Lungs

Provides oxygen for the capillaries and exhales CO2