Arteries carry blood away from the heart

Last option: Preserve an ecosystem

• The establishment of a bird reservation is a way to preserve an ecosystem because reservation provides suitable environment to organism. A healthy ecosystem means large number of biodiversity.
Answer:
C, a long absolute refractory period.
Explanation:
Tetanus is not possible in cardiac muscle tissue because cardiac cells have longer action potentials and a very long refractory period compared to other cells. This helps prevent the heart from cramping and seizing up.
Answer:
Oceanic factors include the pressure gradient, temperature variations and salinity differences
Explanation:
Each factor has a significant effect on the flow of oceanic current..
The pituitary gland and the hypothalamus, located at the base of your brain, control the production of your male hormones and sperm.