Objective

Discuss the major functions of bones

Functions of the Skeletal System

​gives shape to body

supports body weight

protects organs and other body parts

body movement​

​​1) HSC (hematopoietic stem cells) in bone marrow create all types of blood cells. They keep their numbers by continully replicating

​Hematopoiesis

​​2) an HSC develops a surface receptor for a certain stimulating factor

3) Once stimulating factor binds, HSC turns into specific blood cell!​

​Hematopoiesis

​Bone Marrow

2 kinds: Red or yellow

Red: functions in formation of RBCs, WBCs, and platelets

Color is from hemaglobin (Oxygen laiden)​

Subject | Subject

​Bone Marrow

Yellow: Stores fat.

Replaces red as a person ages.

Red in adults is found in skull, collarbones, backbones, ribs, breastbone, and hips​

If necessary, yellow will change to red for BC creation​

Subject | Subject

Store calcium salts (calcium phosphates)

​

When blood is low in calcium, osteoclasts break up bone and release salts into the blood stream​

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​Some text here about the topic of discussion.

Inorganic Salts

They also store

Calcium, phosphorus, magnesium, sodium, potassium, and carbonate ions.

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They also can accumulate harmful metals: lead, radium, strontium.​