What is the top layer of the hearts surface called

The energy available as a result of the motion of a body is called energy. -potential -gravitational -kinetic -chemical

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.

Albinism is an inherited genetic disorder. explain what it is meant by inherited genetic disorder