Cos they dont have vascular structure that can defeat gravity and transport water and minerals
Answer:
I want to say B. he developed OCD at an old age.
Explanation:
im not entirely sure this is correct so please tell me if its not! hope this helps!
Answer:These contractile elements are virtually identical to skeletal muscle. ... (a) Cardiac muscle cells have myofibrils composed of myofilaments arranged in sarcomeres, ... The refractory period is very long to prevent the possibility of tetany, a ... At this point, the calcium ion channels close and K+ channels open, allowing outflux ..
Explanation: