(open or closed), system in which blood is not always contained within a network of blood vessels
(open or closed), system in which blood is contained within a network of blood vessels
specialized cells involved in sexual reproduction
strong connective tissue that supports the body and is softer and more flexible than bone
an animal whose body temperature varies with the temperature of its surroundings
An animal whose body controls and regulates its temperature by controlling the internal heat it produces
either of the two organs in the chest with which people and some animals breathe
Large, flat muscle at the bottom of the chest cavity that helps with breathing
a part of an organism consisting of an aggregate of cells having a similar structure and function
group of tissues that work together to perform closely realated functions
group of organs that work together to perform a specific function
process by which organisms maintain a relatively stable internal environment
the last section of the digestive system, where water is absorbed from food and the remaining material is eliminated from the body
the opening through which food is taken in and vocalizations emerge
tube in wich food travels from mouth to the stomach
large muscular sac that continues the mechanical and chemical digestion of food
organ that completes the chemical digestion of food and absorbs the nutrients
an enzyme that begins the process of breaking down a starch into a simple sugar
nonspecific defense reaction to tissue damage caused by injury or infection
protein that helps destroy pathogens
substance that triggers an immune response
the outer layer of the skin covering the exterior body surface of vertebrates
the deep vascular inner layer of the skin
Subcutaneous layer, attaches dermis to underlying tissue, adipose, areolar connective tissues (energy reserve and padding), vascular
the organs and tissues involved in circulating blood and lymph through the body
tiny, thin-walled blood vessels that allow the exchange of gases and nutrients between the blood and the cells of the body
blood vessels that carry blood away from the heart
throat; passageway for food to the esophagus and air to the larynx
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