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Medical Info.

Basic Trivia

Each hand contains _ bones. 27
Bones are made up of two main types of tissue: _ bone and _ bone. spongy/ compact
_ bone is dense and heavy, and gives a bone its strength. Compact
Compact bone is constructed from microscopic cylinders called _. osteons
At the center of each _ is a cavity containing tiny _ _ that supply bone cells with nutrients. osteon/ blood vessels
_ bone is filled with spaces to make bones lighter. Spongy
A lattice of struts, or _, run through spongy bone. trabeculae
Embedded throughout them are _ that lay down minerals to strengthen the bone. cells
In some bones, the spaces between the struts are filled with _ _, a type of tissue that makes blood cells. bone marrow
An osteoclast's job is to _ bone to release minerals into the blood or to turn _ into bone. dissolve/ minerals
The control center of a cell is its nucleus, with _ pairs of chromosomes- one of each pair from your mother and one from your father. 23
A _ is made up of tightly coiled DNA. chromosome
Layer of skin and outer tissue of head including fat and muscle. scalp
8 curved bones fixed together enclose the brain. cranium
Fixed joint between bones of the skull. suture
3 layered protective membranes surround the brain. meninges
Mostly nerve fibers (axons) that carry information. white matter
Very closely packed nerve cells. gray matter
Folds and creases allow for maximum surface area. gyri and sulci
Large vein that runs over the top of the brain. cavernus sinus
Space within the brain filled with protective fluid. ventricle
Carries visual information from the eye to the brain. optic nerve
Wall of the orbital cavity, made of bone to protect the eye. bony orbit
Sits within bony orbit and is attached to the optic nerve. eyeball
The eight different bones of the cranium don't join together until about _ months of age. 18
Before fusing, the bones are separated by membrane-filled gaps called _. fontanelles
These enable the skull to be squeezed during _, and allow for rapid _ _. birth/ brain growth
The brain's basic component is the _, a spindly, wirelike cell that works by sending electrical signals to other _. neuron/ neurons
There are more than _ billion neurons in the brain, and each has up to _ connections. 100/ 100,000
Every second, trillions of electrical signals dart among our neurons at speeds of up to _ mph. 250
The scalp is dotted with about _ tiny openings called _; a hair grows from each one. 10,000/ follicles
The main part of the brain, the _, is divided into 2 hemispheres. cerebrum
The _ side is usually the best at math and language. left
The _ side is better at visual skills. right
The cerebrum is where thought process, _, and concious movement are processed. memory
The _ _ is the bridge between the two sides of the brain. corpus callosum
The _ coordinates movement and balance. cerebellum
The _ _ regulates vital functions such as breathing. brain stem
The _ _ connects the brain with the rest of the body. spinal cord
The _ _ supplies blood to the head. carotid artery
Each neuron has one _ that carries away outgoing signals, and up to 100,000 branching _ that carry incoming signals to the cell body. axon/ dendrites
The brain takes a _ of the blood pumped by the heart. fifth