CHAPTER 25 VOCAB

Digestive track

• tube that begins at the mouth and ends at the anus

RUMEN

• stomach chamber in cows and related animals in which symbiotic bacteria digest cellulose

GILL

• feathery structure specialized for the exchange of gases with water

Lung

• respiratory organs; place where gases are exchanged between the blood and inhaled air

Alveolus

• One of many tiny air sacs at the end of the bronchiole in the lungs that provide surface area for gas exchange to occur

Open circulatory system

• Type of thing with my system in which blood is only partially contained within a system of blood vessels as it travels through the body

Atrium

• upper chamber of the heart that receives blood from the rest of the body

Ventricle

• lower chamber of the heart that pumps blood out of the heart to the rest of the body

Excretion

• process by which metabolic wastes are eliminated from the body

Kidney

• In Oregon of excretion that separates waste and excess water from the blood

Nephridium

• excretory structure of an annelid that filters body through

Neuron

• nerve cell; specialized for carries messages throughout the nervous system

Sensory neuron

• type of nerve cell that receives information from sensory receptors and conveys signals to the central nervous system

Motor neuron

• type of nerve cell that carries directions from interneurons to either muscle cells or glans

Ganglion

• A group of interneurons

Cerebrum

• part of the brain responsible for voluntary activities of the body; the “thinking” region of the brain

Cerebellum

• Part of the brain that coordinated movement and controls balance

Endocrine gland

• gland that releases its secretions directly into the blood, which transports the secretions to other areas of the body

Placenta

• Specialized organs in placental mammals three which respiratory gases, nutrients, and waste are exchanged between the mother and her developing young