Organ Systems in Mammals

Digestive Components

mouth, pharynx, esophagus, stomach, intestines, liver, pancreas, butt

Digestive Functions

Food processing (ingestion, digestion, absorption, elimination)

Circulatory Components

Heart, blood vessels, bloods

Circulatory Functions

internal distribution of materials

Respiratory Components

Lungs, trachea, other breathing tubes

Respiratory Functions

Gas exchange (uptake of oxygen, disposal of carbon dioxide)

Immune and Lymphatic Components

Bone marrow, lymph nodes, thymus, spleen, lymph vessels, white blood cells

Immune and Lymphatic Functions

Body defense (fighting infections and cancer)

Excretory Components

Kidneys, ureters, urinary bladder, urethra

Excretory Functions

Disposal of metabolic wastes, regulation of osmotic balance of blood

Endocrine Components

Pituitary, thyroid, pancreas, adrenal, and other hormone-secreting glands

Endocrine Functions

Coordination of body activities (such as digestion and metabolism)

Reproductive Components

Ovaries or testes and associated organs

Reproductive Functions

Reproduction

Nervous Components

Brain, spinal cord, nerves, sensory organs

Nervous Functions

Coordination of body activities; detection of stimuli and formulation of responses to them

Integumentary Components

Skin and its derivatives (such as hair, claws, skin glands)

Integumentary Functions

Protection against mechanical injury, infection, dehydration; thermoregulation

Skeletal Components

Skeleton (bones, tendons, ligaments, cartilage)

Skeletal Functions

Body support, protection of internal organs, movement

Muscular Components

Skeletal muscles

Muscular Functions

Locomotion and other movement

What is the one system that could not work and the animal would still be fine?

Reproductive System