Do now – 2-22-10Do now – 2-22-10 List the functions of the skeletal system List the functions of the skeletal system

(hint: there are 5 of them)(hint: there are 5 of them) AnswersAnswers The skeleton gives shape and support to your body. The skeleton gives shape and support to your body. Bones protect your internal organs. For example, ribs Bones protect your internal organs. For example, ribs

surround the heart and lungs, and the skull encloses the surround the heart and lungs, and the skull encloses the brain. brain.

Major muscles are attached to bone and help them Major muscles are attached to bone and help them move. move.

Blood cells are formed in the center of many bones in Blood cells are formed in the center of many bones in soft tissue called red marrow. soft tissue called red marrow.

Major quantities of calcium and phosphorous compounds Major quantities of calcium and phosphorous compounds are stored in the skeleton for later use. Calcium and are stored in the skeleton for later use. Calcium and phosphorus make bones hard phosphorus make bones hard

Do now – 2-23-10Do now – 2-23-10

1. Describe how shivering helps you 1. Describe how shivering helps you maintain homeostasis (stable body maintain homeostasis (stable body

temperature) on a cold day.temperature) on a cold day.

2. Describe how a muscle attaches to a 2. Describe how a muscle attaches to a bonebone

AnswersAnswers

1. Increased contraction of muscles is the 1. Increased contraction of muscles is the body’s response to cold.body’s response to cold.

As the muscles contract, heat energy is As the muscles contract, heat energy is released and maintains body temperature.released and maintains body temperature.

2. Thick bands of tissue called tendons 2. Thick bands of tissue called tendons attach muscles to bones.attach muscles to bones.

2-24-102-24-10

Name and give an example of a Name and give an example of a movable and immovable joint.movable and immovable joint.

AnswersAnswers

Movable joint – base of skull, Movable joint – base of skull, shoulder, hipshoulder, hip

Immovable Joint – skull, pelvisImmovable Joint – skull, pelvis

2-25-102-25-10Name a body function controlled by Name a body function controlled by

involuntary muscles.involuntary muscles.

1.1. Blood pumping through vesselsBlood pumping through vessels

2.2. Food moving through digestive Food moving through digestive systemsystem

3.3. Breathing Breathing

List the major functions of skinList the major functions of skin

ProtectsProtectsRegulates body temperatureRegulates body temperatureExcretes wastesExcretes wastesServes as sensory organServes as sensory organForms vitamin DForms vitamin D