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BIOL212
Majors animal: Anatomy of the tunicate (matching)
Anatomy | Physiology |
---|---|
Incurrent siphon | Water enters this opening, bringing fresh oxygen and suspended food particles |
Excurrent siphon | Water exits this opening, carrying wastes and carbon dioxide out of the animal |
Pharynx | Receives incoming water from mouth, entraps food in a film of mucus, and is responsible for gas exchange |
Endostyle | Secretes mucus that forms sticky coating of pharynx to trap food particles |
Pharyngeal slits | Allow for outflow of water from pharynx into atrium |
Atrium | Body chamber that receives water passed from pharynx through pharyngeal slits |
Stomach | Primary digestive organ |
Intestine | Site of nutrient absorption |
Anus | Regulates egestion of undigested food (feces) from the body |
Stolons | Holdfasts that allow animal to anchor itself firmly to substrate |
Heart | Pumps blood through vessels and sinuses of open circulatory system |
Adhesive discs | Used by larvae to attach to substrate prior to metamorphosis |
Notochord | Provides skeletal support for anchoring of swimming muscles in the larval form |
Dorsal nerve cord | Handles nervous coordination in the larval form |