skeleton
support
the hard structure (bones and cartilages) that provides a frame for the body of an animal
structure that holds up or provides a foundation
protect
muscles
shield from danger, injury, destruction, or damage
animal tissue consisting predominantly of contractile cells
bones
cartilage
function to move, support, and protect the various organs of the body, produce red and white blood cells and store minerals
a stiff yet flexible connective tissue found in many areas in the bodies of humans and other animals. It is not as hard and rigid as bone but is stiffer and less flexible than muscle.
cells
tissue
the basic unit of all living organisms
a group of biological cells that perform a similar function
marrow
calcium
the interior of long bones
major material used in mineralization of bones and shells
pellet
movable joints
a round ball of undigested matter that some bird species regurgitate
A joint in which the opposing bony surfaces are covered with a layer of cartilage and in which some degree of free movement is possible
immovable joints
gliding joints
joint in which the ends of the bones forming the joint are dovetailed together and connected by tough fibrous tissue.
joint in which the joint surfaces are flat and allow only a gliding motion
ball and socket joints
hinge joints
the ball-shaped surface of one rounded bone fits into the cup-like depression of a muscle. It enables the bone to move in a 360° angle.
A joint, such as the elbow, in which a convex part of one bone fits into a concave part of another, allowing motion in only one plane.
flexibility
backbone
the ability to bend easily or be easily changed
the vertebrate spine or spinal column
vertebrae
spinal column
The individual bones of the spinal column which are stacked on top of each other
The series of articulated vertebrae, separated by disks and held together by muscles and tendons, encasing the spinal cord and forming the supporting axis of the body
opposable
strength
can be placed opposite something else (ex. the thumb)
The power to resist strain or stress
articulated
tendon
United by, or provided with, articulations; jointed (ex. skeleton)
A band of tough, inelastic fibrous tissue that connects a muscle with its bony attachment
cardiac muscles
skeletal muscles
The specialized striated muscle tissue of the heart; the myocardium
moves the skeleton and is responsible for all our voluntary movements
smooth muscles
heart
Muscle tissue that contracts without conscious control, such as the stomach, intestine, bladder, and blood vessels, excluding the heart.
The chambered muscular organ in vertebrates that pumps blood received from the veins into the arteries
contract
relax
To reduce in size by drawing together; shrink
To become less restrained or tense
vein
artery
Any of the membranous tubes that form a branching system and carry blood to the heart.
Any of the muscular elastic tubes that form a branching system and that carry blood away from the heart to the cells, tissues, and organs of the body
involuntary muscle
voluntary muscle
Muscle not under the control of the will; usually consists of smooth muscle tissue is usually associated with skin.
Muscle under conscious control
stimulus
response
An agent, action, or condition that elicits or accelerates a physiological or psychological activity or response.
A reaction, as that of an organism or a mechanism, to a specific stimulus.