DO NOW THURSDAY What cell part does photosynthesis happen in? What cell part does cell respiration happen in?

TODAYS PLAN Explain that a cell is the smallest living unit. Describe specialized cells. Describe an organelle. Describe the function of the nucleus, chloroplast, mitochondria, cell membrane, and cell wall. Discriminate among the different functions of the nucleus, chloroplast, mitochondria, cell membrane, and cell wall. Develop and use a cell model to describe the function of a cell as a whole and ways that parts of the cell contribute to the function (specifically cell wall and cell membrane) TODAYS DO We will complete a foldable as we learn about cells and their parts. You need to be thinking about how the jobs these cell parts perform can be compared to the jobs that other objects perform for a project we will do tomorrow.

Cells and Cell Organelles

Cells Cells are the smallest LIVING things. Cells in an organism can become specialized to do special jobs.

Cells For example, muscle cells are long and ropelike to allow muscles to stretch (relax) and bounce back (contract).

Cells While nerve cells are very long and branched like wires to allow them to send electrical signals all over your body.

CELL PARTS Are called ORGANELLES- small “organ” in a cell with a specific function (job) Can be compared to the parts of lots of other things because they have similar functions

CELL MEMBRANE Acts as a barrier-controls what gets in and out of cell Like the skin of your body

Cell membrane

CYTOPLASM Gel-like goo that holds organelles

cytoplasm

NUCLEUS Control Center of Cell- controls all cell activities Like your brain

}-- nucleus

NUCLEAR ENVELOPE Encloses the nucleus Image from:

Nuclear envelope

NUCLEOLUS Dark area in nucleus where ribosomes are made

Nucleolus

CHROMATIN “strings” of DNA + protein inside nucleus

chromatin

MITOCHONDRION (plural=MITOCHONDRIA) Powerhouse of cell- where energy is released from food –cell respiration Like the food you eat

----mitochondrion

RIBOSOMES Makes proteins for cell

-----ribosomes

ENDOPLASMIC RETICULUM Provides passageways for materials to move through the cell Like blood vessels in your body

Endoplasmic reticulum------

GOLGI BODY Packages and ships materials out of cell Image from: Like your large intestine

Animation from: See a Golgi movie

-----Golgi body

It’s ALL connected!ALL connected

ANIMAL CELLS ONLY Cytoskeleton Small vacuoles Lysosomes

CYTOSKELETON Gives cell shape and support Like the skeleton of your body

Cytoskeleton

SMALL VACUOLES Storage “sacs”

Vacuole

LYSOSOMES Animation from: Digest food and get rid of “trash”- old organelles, bacteria, etc.

Lysosome---

PLANT CELLS ONLY Cell wall HUGE Central vacuole Chloroplasts

CELL WALL Supports and protects the plant cell and gives it shape

Cell wall

CENTRAL VACUOLE Storage space for WATER, food, and wastes

Central vacuole

CHLOROPLASTS Use energy from sunlight to make own food (glucose)- photosynthesis

--Chloroplast