Nettet12. jul. 2024 · Sea Star Anatomy 101. Although they are commonly called starfish, these animals aren't fish, which is why they are more commonly referred to as sea stars . Sea stars are echinoderms, which means they are related to sea urchins, sand dollars, basket stars, brittle stars, and sea cucumbers. All echinoderms have a calcareous skeleton … NettetLupus is a disease of the immune system. It can affect many parts of the body. Normally, the immune system makes antibodies to protect the body against infections. In people …
pH in the Human Body - News-Medical.net
Nettet16. mar. 2024 · Mucus is a protective substance that’s excreted from multiple areas of the body, such as the mouth, sinuses, throat, lungs, stomach, and intestines ( Figure 1 ). Mucus itself consists of multiple constituents, but its major component is a substance called mucin. The mucins in mucus can work as a selective barrier, lubricant, or viscous ... Nettet23. mar. 2024 · In addition to entering through the nasal cavity, air can also enter through the mouth. Once air enters the body, it flows into the lower portion of the upper respiratory system with the pharynx ... braden\u0027s hope gala 2022
Body Systems - The Definitive Guide Biology Dictionary
Nettetmouth, also called oral cavity or buccal cavity, in human anatomy, orifice through which food and air enter the body. The mouth opens to the outside at the lips and empties into the throat at the rear; its boundaries are defined by the lips, cheeks, hard and soft … gum, also called gingiva, plural gingivae, in anatomy, connective tissue covered with … In most animals, food enters the body through the mouth. The mouth is the … lips, soft pliable anatomical structures that form the mouth margin of most … salivary gland, any of the organs that secrete saliva, a substance that … Take these quizzes at Encyclopedia Britannica to test your knowledge on a … ORIFICE meaning: a hole or opening and especially one in your body (such as … Johann Christian Fabricius, (born Jan. 7, 1745, Tøndern, Den.—died March 3, … NettetThe GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and … NettetThere are other systems in the body that are not organ systems. For example, the Immune system protects the organism from infection, but it is not an organ system as it is not composed of organs. Some organs are in more than one system. For example, the nose is in both the respiratory system and also is a sensory organ in the nervous system. suzanne tamim