Body SystemsBody SystemsOverviewOverview

1. 1. cell membranecell membrane - the - the thin outer covering of a thin outer covering of a cell; holds the cell cell; holds the cell togethertogether2. 2. nucleusnucleus – the small – the small central core in almost central core in almost every cell; stores every cell; stores information and directs information and directs all the activities of the all the activities of the cell.cell.3. 3. cytoplasmcytoplasm – the – the material between the material between the cell membrane and the cell membrane and the nucleus; made up of nucleus; made up of many parts that help many parts that help the cell workthe cell work

4. 4. cellcell – is the basic unit of all living things – is the basic unit of all living things5. 5. tissuetissue – a group of cells that are alike and – a group of cells that are alike and work together to do the same job.work together to do the same job.6. 6. organorgan – a body part made up of various – a body part made up of various tissues; does a certain job in the body.tissues; does a certain job in the body.7. 7. body systembody system – a group of organs that work – a group of organs that work together to do a certain job.together to do a certain job.

1. What are your cells?1. What are your cells?– a. Everything in your body is made of a. Everything in your body is made of

cellscells– b. Different cells have different shapes b. Different cells have different shapes

and do different and do different jobsjobs

– c. Almost all have the c. Almost all have the same 3 partssame 3 parts

i. i. Cell membraneCell membrane – thin – thin outer covering that holds outer covering that holds the cell together, lets in the cell together, lets in water and everything else water and everything else the cell needs, keeps out the cell needs, keeps out most things that could harm most things that could harm the cellthe cellii. ii. NucleusNucleus – small center – small center that stores information and that stores information and directs all the activities of directs all the activities of the cell, “the cell, “brainbrain”, sends ”, sends messagesmessagesiii. iii. Cytoplasm Cytoplasm – material – material that is between the nucleus that is between the nucleus and cell membrane. Made and cell membrane. Made up of parts that help the cell up of parts that help the cell work.work.

2. What are your tissues?2. What are your tissues?– a. a. Tissue Tissue – a group of cells, ex: – a group of cells, ex:

muscles, blood, skin, hair, bonemuscles, blood, skin, hair, bonei. Each does a different job and i. Each does a different job and

are specially formed for the work they do - are specially formed for the work they do - ““functionfunction””

ii. EX: bone cells are hard and ii. EX: bone cells are hard and cannot bend, skin cells are flat and thin cannot bend, skin cells are flat and thin and fit tightly together at the edgesand fit tightly together at the edges

3. What are your 3. What are your organs?organs?

– a. Tissues work a. Tissues work togethertogether to make up to make up organsorgans

– b. Each organ does a b. Each organ does a specific job to help you specific job to help you stay alive and healthystay alive and healthy

– c. EX: heart is an organ c. EX: heart is an organ that pumps the that pumps the bloodblood, , eyes are organs that eyes are organs that help you help you seesee

4. What are your body systems?4. What are your body systems?– d. some organs are part of more than d. some organs are part of more than

one one systemsystem– e. systems work together to make sure e. systems work together to make sure

that the body maintains that the body maintains homeostasis homeostasis – is – is the condition in which the body’s internal the condition in which the body’s internal conditions are at a stable stateconditions are at a stable state

Body Systems WorksheetsBody Systems Worksheets

ReviewReviewWhat are the three main parts of a What are the three main parts of a cell?cell?What are the three jobs of a cell What are the three jobs of a cell membrane?membrane?How do cells, tissues and organs How do cells, tissues and organs work together in the body?work together in the body?How can a problem in one body How can a problem in one body system affect another body system?system affect another body system?