The term 'body cavity' refers to the various hollow spaces within the human body. Coelom (6 letters) is a fluid-filled cavity that is found in some animals and is located between the body wall and the gut. The cecum (5 letters) is a pouch-like structure located at the beginning of the large intestine. SINUS (5 letters) is an air-filled cavity in the skull that connects to the nasal passages. Ventricle (9 letters) is a chamber of the heart that pumps blood throughout the body. ABDOMEN (7 letters) is the part of the body between the chest and the pelvis. Finally, fossa (5 letters) is a shallow depression or cavity in the surface of a bone.