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Cell Organelles

+ Internal Organization

Organelles: parts of a cell, have specific jobs

Tissues: groups of cells that have a similar function

+Skin Cells

+Death of Tissue

+ Organ SystemsOrgan systems- a group of organs that work together to perform a set of related tasks. Digestive system includes: the stomach, esophagus, intestines and mouth.

Cells→Tissues→Organs→Organ Systems

+Human Circulatory System

+Cell Organelles!

Cell Membrane – separates cell from external environment, gives shape and flexibility to cell, selectively permeable

+Continue…

Cytoplasm: gelatin like aqueous fluid called cytosol Cytoplasmic streaming Mostly water but also salts and organic molecules

+Continue… Mitochondia: power house of the cell! Where cellular

respiration occurs, production of ATP, has it’s own DNA Cristae: inner membrane creating many folds to increase

surface area

+Continue… Ribosomes: where proteins are made,

Free Floating Ribosome: make proteins for the cell Ribosomes attached to ER: make proteins to be exported

from the cell

+Continue… Endoplasmic Reticulum: (ER) acts as a highway for

molecules to move around the cell. Smooth ER: does NOT contain ribosomes; cell detox;

manufactures lipids; stores calcium ions Rough ER: does contain ribosomes; sites of protein

synthesis;

+Continue… Golgi Apparatus (bodies) processes, packages, and

secretes

a) product is assembled (moves from ER to golgi, where it is put together and adjusted)

b) product is packaged (in new sacs)

c) product is mailed out (sent out of cell)

+Continue….

Cilia: short hair like projections beat together to move an organism ex: humans trachea cilia move fluids and mucus! YUM

+Continue… Flagella: long, whiplike projections, single or in pairs, rapid

movement, ex: sperm

+Continue…. Nucleus: brains! Control center of cell, DNA & RNA are

made here! Nuclear envolope: double membrane with pores Chromatin: fine strands of DNA & protein Nucleolus: inside nucleus where ribosomes are made

+Continue… Lysosome: digestive enzymes, digest food, disease

causing bacteria, old organelles, ex: lysosomes eat up tissue between fingers in embryos, usually only in animal cells

+Continue… Cytoskeleton- helps shape & support cells

Microtubules: long slender protein tubes form spindle fibers during mitosis

Microfilaments: fine protein threads

+Animal cell only!

Centrioles: cell reproduction

Centrosome: cell reproduction

+Animal Cell