Which blood vessels carry oxygen-rich blood from the lungs to the heart?
o
a. arteries
b. veins
c. capillaries
d. alveoli

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.

Explain why ecosystem diversity results in species diversity in a healthy biosphere

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity