Cells, tissues, systems and DNA

a basic unit of life for all living things

40 trillion

each cell has a different role, the size and shape if the cell relates to its purpose and funciton

we call those components organelles because they are like very small organs onside each cell that allows it to fulfill its purpose and stay alive.

cell membrane, nucleus, chromosomes, cytoplasm, mitochondria

-description: thin skin separates inside of cell with outside, mostly fat -function: Controls what enter and exit cell

-description: large round(oval) near center of cell -function: control center for all activities of cell. (like the brain)

-description: rod shaped body inside nucleus, made of DNA and proteins -function: passes hereditary information of the cell

-description: fluid that fills the cell around the organelles -function: maintain cell shape and help organelles move through cell

-description: tiny, bean shaped in cytoplasm -function: supplies the energy of the cell by transforming sugar into energy

stem cell

skin cell, muscle cell, nerve cell, bone cell, cardiac cell etc

a group of cells that perform a similar fonction

epithelial, connective tissue, muscle tissue, nervous tissue

lines surface of body, and inner surface of organs, there must be an exposed layer(surface)

protects, supports and connect other tissues, can be found between muscles, around muscles groups and blood vessels

made up of elongates cells tat can contract which allows for body movement skeletal, smooth, cardiac

made up of neurons, reacts to stimulus and conducts impulses

cells combine make tissues, tissues form organs, organs combine and form system

a collection of one or more organs and tissues that work together, connected adn carry out particular function

digestive, circulatory, reproductive, respiratory

in nucleus

A, T, G, C

segment if dna, determines specific genetic characteristics, passed in reproduction