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THE HUMAN BODY SYSTEMS
System Function Diagram Major Organs
Interactions- Working with Other Systems
Digestive
- take in food (ingestion)
- digest food into smaller molecules and absorb nutrients
- remove undigestable food from body (feces)
Mouth, esophagus, stomach, Sm. Intestine, Lg. intestine, rectum, anus
Salivary glands, pancreas, liver, gall bladder
- w/circulatory โ absorb & deliver the digested nutrients to the cells
- w/muscular โ control the contractions of many of the digestive organs to pass food along 3.w/nervous โ hypothalamus maintains homeostasis by triggering appetite (stomach growling), digest.
Circulatory
Transport materials to and from cells
Heart Veins Arteries Capillaries Red blood cells
- w/respiratory โ deliver O 2 from lungs to cells and drop off CO (^2) from cells to lungs
- w/digestive โ absorb and deliver digested nutrients to cells
- w/excretory โ kidneys filter cellular waste out of blood for removal
- w/lymphatic โ both transport things to and from cells
- w/immune โ transports WBCs throughout body to fight disease
- w/nervous โ brain controls heartbeat
- w/endocrine โ trans. hormones
Nervous
- gathers and interprets information
- responds to information
- helps maintain homeostasis
Brain Spinal cord
Nerves Nerve cells = neurons
hypothalamus
Controls all other systems
Hypothalamus โ maintains homeostasis by working with all systems
System Function Diagram Major Organs Working with Other Systems
Excretory
- removes waste products from cellular metabolism (urea, water, CO 2 )
- filters blood
Kidneys Ureters Bladder Urethra
Lungs Skin โ sweat glands Liver (produces urea)
- w/circulatory โ filters waste out of blood
- w/lungs โ removes excretory waste
- w/integumentary โ removes excretory waste
Respiratory
Takes in oxygen and removes carbon dioxide and water
Nose Trachea Bronchi Bronchioles Alveoli lungs
- w/circulatory โ takes in O 2 for delivery to cells and removes CO 2 brought from cells
- w/excretory โ removes excretory waste
- w/nervous โ controls breathing
- w/muscular โ diaphragm controls breathing
Skeletal
- protects organs
- provides shape, support
- stores materials (fats, minerals)
- produces blood cells
- allows movement
Bones Cartilage ligaments
- w/muscular โ allow movement
- w/circulatory โ produce blood cells
- w/immune โ produce white blood cells
- w/circulatory and respiratory โ protects itโs organs
System Function Diagram Major Organs Working with Other Systems
Integumen- tary
- barrier against Infection (1 st^ line of defense)
- helps regulate body temp.
- removes excretory waste (urea, water)
- protects against sunโs UV rays
- produces vitamin D
SKIN
*Epidermis
*Dermis
- sweat gland
- sebaceous gland (oil)
- hair follicle
- blood vessels
- nerves
- w/excretory โ removes cellular waste
- w/nervous โ controls body temperature (sweating, goose bumps)
- w/immune โ prevents pathogens from entering
Lymphatic
- stores and carries WBCโs that fight disease
- collects excess fluid and returns it to blood (2 nd circulatory system-reaches places other one canโt โ between cells)
Lymph (liquid part of blood โ plasma, when itโs in lymph vessels)
Lymph Vessels Lymph Nodes Contain WBCs
- w/immune โ holds lots of WBCs to fight pathogens
- w/circulatory โ to transport materials to and from cells
Reproduct- ive
Allows organisms to reproduce which prevents their species from becoming extinct.
Ovaries *produce eggs
Testes *produce sperm
- w/endocrine โ controls production of sex cells
- w/muscular โ uterus contracts to give birth โ controlled by hormones
