Bio Vocab

A medical preparation that stimulates an immune response without causing disease.

A membrane-bound storage organelle, large in plant cells and smaller in animal cells.

The narrowing of blood vessels near the skin to reduce heat loss.

The widening of blood vessels near the skin’s surface to release excess heat.

A blood vessel that carries deoxygenated blood back to the heart.

A small membrane-bound sac that transports materials within the cell.