Circulatory- INCLUDES: Heart, blood vessels, blood lymph nodes and vessels, lymph FUNCTIONS: Transports nutrients, wastes, hormones, and gases
Digestive- INCLUDES: Mouth, throat, esophagus, stomach, liver, pancreas, and small and large intestines. FUNCTIONS: Extracts and absorbs nutrients from food; removes wastes; maintains water and chemical balances.
Endocrine- INCLUDES: Hypothalamus, pituitary, pancreas, and many other endocrine glands. FUNCTIONS: Regulates body temperature, metabolism, development, and reproduction; maintains homeostasis; regulates concentration of body fluids.
Excretory- INCLUDES: Kidneys, urinary bladder, ureters, urethra, skin, lungs FUNCTIONS: Removes wastes from blood; regulates conccentration of body fluids.
Immune- INCLUDES: White blood cells, lymph nodes and vessels, skin. FUNCTIONS: Defends against pathogens and disease.
Integumentary - INCLUDES: Skin, nails, hair FUNCTIONS: Protects against injury, infection, and fluid loss; helps regulate body temperature.
Muscular- INCLUDES: Skeletal, smooth, and cardiac muscle tissues. FUNCTIONS: Moves limbs and trunk; moves substances through body; provides structure and support.
Nervous- INCLUDES: Brain, spinal cord, nerves, sense organs. FUNCTIONS: Regulates behavior; maintains homeostasis; regulates other organ systems; controls sensory and motor fuctions.
Repertory- INCLUDES: Lungs, nose, mouth, trachea. FUNCTIONS: Moves air into and out of lungs; controls gas exchange between blood and lungs.
Skeletal- INCLUDES: Bones and joints. FUNCTIONS: Protects and supports the body and organs; interacts with skeletal muscles, producs red blood cells, white blood cells, and platelets
Positron Emission Tomography scan of the brain of cocaine addicts showed that the drug affects how the brain use glucose. Cocaine users' brain cannot use glucose efficiently and there are also reduced metabolic activity in other areas of the brain.
Pieces of genes can be inserted into the genetic material of prokaryotes so that they will make the protein products encoded in the genes or copies of the genes themselves
At heart, all life on Earth uses a membrane that separates the organism from its environment. ... In this regard, water is essential simply because it's a liquid at Earth-like temperatures. Because it flows, water provides an efficient way to transfer substances from a cell to the cell's environment.
