5th Grade Ch. 2 Lesson 3 How do organs work together?

Ch. 2Lesson 3How do

organs work together?

organ system • group of organs & tissues that work

together to carry out a life process

skeletal system

206 bones

supports body

protects internal organsstores calcium

muscular system

•about 640 muscles

muscular system•muscle cells work in bundles

Muscles work in pairs to

move bones:1 muscle

relaxes- other muscle

contracts

Many organ systems work together.

Skeletal system + circulatory system

Muscular system + skeletal system work together to

move body

Musculoskeletal System

organ system

• group of organs and tissues that work together to carry out a life process

How many muscles are in the muscular

system?

640

How many bones are in the skeletal

system?

About 200 bones

(206)

• The muscular system works with the ___________ system to move the body.

skeletal

Muscles work in ________ to move

bones.pairs

Many organ systems work together.

TRUE OR FALSE

TRUE

3 functions of the skeletal system

supports bodyprotects internal organsstores calcium