Fluid is contained in a continuous system of vessels.

Keeping internal body conditions constant is called

outer layer of cells that form a boundary between the plant and the external environment

An enzyme present on the skin breaks down pathogenic proteins

The particular part of an antigen that is the focus of an adaptive immune response is called the

Chambers of the heart that receive blood

Class of hormone derived from cholesterol

The seal that stops water from freely flowing between the endodermal cells into the xylem

Phagocytes are also activated and recruited to wounds and sites of infection by chemical alarm signals called

Activate other immune cells, and can recognize and kill cells of the body infected with pathogens

Small vessels that take deoxygenated blood back to the heart

Disease that causes the immune system to destroy the cells that produce insulin

transports carbohydrates from photosynthetic areas to rest of plant

Immune cells in general or WBCs are known as

general term for a condition caused by autoreactive immune cells that are not killed off

Disperses through the tissues; returns to the heart through openings called

Insulin is classified as what type of hormone

Type of transport in which water travels between root cells transport

Phagocytes recognize foreign substances using

random genetic mutation of an infectious agent resulting in minor changes in the antigens

Smooth muscles that regulate blood flow into capillaries.

A gland that regulates body temperature

H2O Evaporates through openings in the leaves called

Skin cells that form a protective barrier are also known as

A severe and life-threatening allergic reaction