science vocab Flashcards
voluntary muscles
muscle whose action is normally controlled by an individual’s will
involuntary muscles
muscle governing reflex functions and not under direct voluntary control
smooth muscles
an involuntary, non-striated muscle
skeletal muscles
a muscle which is connected to the skeleton to form part of the mechanical system which moves the limbs and other parts of the body.
cardiac muscles
makes up the thick middle layer of the heart.
epidermis
The outer layer of the two main layers of the skin.
dermis
The inner layer of the two main layers of the skin.
hypodermis
the bottom layer of skin in your body
joints
the part of the body where two or more bones meet to allow movement.
chemical digestion
the process where complex molecules like proteins, fats, and carbohydrates are broken down into smaller pieces that your body can use.
enzymes
a biological catalyst and is almost always a protein.
saliva
watery liquid secreted into the mouth by glands, providing lubrication for chewing and swallowing, and aiding digestion.
movable joints
the joints that are capable of moving in a variety of directions
immovable joints
the two or more bones are in close contact, but no movement can occur
bile
a bitter greenish-brown alkaline fluid that aids digestion and is secreted by the liver and stored in the gallbladder.