Question

cardiac sphincter is voluntary or not​

Answer 1

Answer:

it is not voluntary

Explanation:

as we cannot control it.

Answer 2

Answer:The inner muscle is not under voluntary control but rather is controlled by the autonomic nervous system. The external sphincter can be voluntarily controlled, meaning it can be clenched and unclenched.

Explanation:  A sphincter is a circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning. Sphincters are found in many animals. There are over 60 types in the human body, some microscopically small, in particular the millions of precapillary sphincters.[1] Sphincters relax at death, often releasing fluids and feces.[2]

• Voluntary sphincters are supplied by somatic nerves.

• Involuntary sphincters are stimulated by autonomic nerves.