The knee joint is an example of a body joint that opens and closes as it flexes and extends during movement.
The mouth of a cnidarian, such as a jellyfish or sea anemone, opens into a central body cavity called the gastrovascular cavity. This cavity serves both digestive and circulatory functions, as it allows nutrients to be absorbed and distributed throughout the organism's body.
Probably because you can visualize the same from out side. You can list the same in internal body cavity and you wont be wrong. Mostly because the mouth and the anus both lead to the external environment.
Pisces or fish have true internal body cavity.
No, the sphincter and the epiglottis are not the same thing. The sphincter is a ring-like muscle that opens and closes to control the flow of substances in the body, such as in the digestive or urinary systems. The epiglottis is a flap of tissue that helps prevent food and liquid from entering the airway during swallowing by covering the entrance to the larynx.
The knee joint is an example of a body joint that opens and closes as it flexes and extends during movement.
mucosa
Opens and closes your lower jaw
The mouth of a cnidarian, such as a jellyfish or sea anemone, opens into a central body cavity called the gastrovascular cavity. This cavity serves both digestive and circulatory functions, as it allows nutrients to be absorbed and distributed throughout the organism's body.
i believe it is the diaphragm.
Your question is not clear, but the diaphragm is the muscle that divided the abdomen from the thorax (the chest cavity from the abdominal cavity). Ventral is term that is used mostly in veterinary medicine and it refers to the side of the body that has the belly button.
sea anemone possess hydrostatic skeleton . Its cavity is filled with seawater to extend its body and tentacles . The sea anemone closes its mouth and contracts its muscle fibres that are arranged in circles around its body . The contraction of these circular muscles put pressure on liquid of the body cavity . This pressure forces the body to maintain upright position
Answer: skeletal musculature( connective tissue)
Diaphragm
Diaphragm
Probably because you can visualize the same from out side. You can list the same in internal body cavity and you wont be wrong. Mostly because the mouth and the anus both lead to the external environment.
The body cavity surrounded by muscle is called the coelom. It houses and protects internal organs such as the digestive system, reproductive organs, and respiratory system in many animals. The muscles surrounding the coelom provide support and allow for movement of these organs within the cavity.