Unit 6 Vocab Words Flashcards
(27 cards)
Epidermis
The outer layer of skin
Dermis
The thick lower layer of skin beneath the epidermis.
Cuticle
The protective waterproof outer layer of the epidermis of an animal.
Cartilage
A tough flexible tissue that cushions joints and makes up body parts such as the ear and the trachea
Axial skeleton
The part of the skeleton made up of the skull, backbone, and rib cage
Appendicular skeleton
The part of the skeleton made up of the bones in the shoulders, arms, pelvis, and legs.
Myofibrils
Long, rod-shaped cells which make up muscle tissue
Involuntary muscle
Muscles that act automatically, like the heart.
Voluntary muscle
Muscles that can be consciously controlled, like the arm
Neuron
A nerve cell
Sensory Neuron
Neurons ending in sensitive receptors, they carry information to the central nervous system
Motor neuron
Neurons which pass instructions from the central nervous system to the body.
Hormone
A chemical which helps to control the level of substances in the body
Endocrine gland
A hormone-making gland
Arteries
Strong vessels that carry blood away from the heart to the body
Veins
The vessels carrying blood to the heart
Hemoglobin
A purple-red chemical in red blood cells that is responsible for carrying oxygen
Inhalation
Breathing in
Exhalation
Breathing out
Digestive enzyme
The fluids produced by digestive glands which contain enzymes that break down food into simpler substances
Villi
Tiny, finger-like projections on the lining of the intestine which absorb digested food
Excretion
The removal of waste substances from the body
Bacteria
A group of microscopic organisms without cell nuclei, many of which cause disease
DNA
The acid found in cell nuclei that forms the genes and chromosomes of all living things
