1. Why does the immune system make memory cells?

Which statement describes an endocrine function rather than an exocrine function? a. salivary glands release saliva into the mouth. b. sweat glands release sweat onto the skin c. the pineal gland releases melatonin into the blood. d. esophageal glands release mucus into the esophagus.

Cells destroy body cells infected by a virus or bacteria.

Identify the composition of oceanic and continental crystal rocks.in a model of earth’s interior,where would these rocks appear?