Skeletal System

Introduction to the Skeletal System 

by Maggie

 

Bone, or osseous tissue, is a hard, dense connective tissue that forms most of the adult skeleton, the support structure of the body. In the areas of the skeleton where bones move (for example, the ribcage and joints), cartilage, a semi-rigid form of connective tissue, provides flexibility and smooth surfaces for movement. The skeletal system is the body system composed of bones and cartilage and performs the following critical functions for the human body:

  • supports the body
  • facilitates movement
  • protects internal organs
  • produces blood cells
  • stores and releases minerals and fat

 

 The skeletal system in an adult body is made up of 206 individual bones. These bones are arranged into two major divisions: the axial skeleton and the appendicular skeleton. The axial skeleton runs along the body’s midline axis and is made up of 80 bones in the following regions:

  • Skull
  • Hyoid
  • Auditory ossicles
  • Ribs
  • Sternum
  • Vertebral column
The appendicular skeleton is made up of 126 bones in the folowing regions:
  • Upper limbs
  • Lower limbs
  • Pelvic girdle
  • Pectoral (shoulder) girdle

    What is the function of the skeletal system?

    The skeletal system’s main function is to provide support for the body. For example, the spinal column provides support for the head and torso. The legs, on the other hand, support and bear the weight of the upper body while a person stands.
    But the skeletal system has several additional functions, including:
  • Protecting internal organs from injury. For example, the skull protects the brain, while the thoracic cage protects the heart and lungs.
  • Allowing for movement. Muscles attach to bones through tendons. This connection allows the body to move in many different ways.
  • Producing blood cells. The soft bone marrow inside of many bones produces red blood cells, white blood cells, and platelets.
  • Storing minerals and nutrients. Bones can store and release minerals, including calcium and phosphorus, which are important for many bodily functions. Additionally, adipose (fat) tissue that can be used as energy can be found in part of the bone marrow.

↭LEARN MORE BY SEEING AND PLAYING






 









THE VIDEO IS NOT MY IS OF:: https://3d4medical.com/exercise AND https://www.khanacademy.org/science/high-school-biology/hs-human-body-systems/hs-the-musculoskeletal-system/v/skeletal-structure-and-function


❓Critical Thinking Questions


➱One of the ways to know if you really learned a topic is by asking questions. So answer the questions and compare with the solutions.

  1. Suppose your red bone marrow could not be formed. What functions would your body not be able to perform?





Suppose your osseous tissue could not store calcium. What functions would your body not be able to perform? 

Solutions

Answers for Critical Thinking Questions

  1. Without red bone marrow, you would not be able to produce blood cells. The red bone marrow is responsible for forming red and white blood cells as well as platelets. Red blood cells transport oxygen to tissues, and remove carbon dioxide. Without red blood cells, your tissues would not be able to produce ATP using oxygen. White blood cells play a role in the immune system fighting off foreign invaders in our body – without white blood cells you would not be able to recover from infection. Platelets are responsible for clotting your blood when a vessel ruptures. Without platelets you would bleed to death and die.
  2.  The calcium in osseous tissue provides mineral support to bones. Without this calcium, the bones are not rigid and cannot be supportive. The calcium in osseous tissue is also an important storage site, that can release calcium when needed. Other organ systems rely on this calcium for action (specifically, muscle contraction and neural signaling). Without calcium storage, blood calcium levels change dramatically and affect muscle contraction and neural signaling.

    😊 If you want learn more abaut the skeletal system, i recomended use apps  like:

3D MEDICAL: https://3d4medical.com/apps/skeleton-system-pro

HUMAN 3.0:https://chrome.google.com/webstore/detail/human-30/meefjekipolcgabfgaclcpdkbghhmoah

 becuase is more funny ands easy memorice .

 🎮GAME  

have fun playing and seeing how much you learned about the topic.
"Learn the Skeletal System"://www.abcya.com/skeletal_system.htm

ᏈQUIZ ONLINE

 STUDY JAMS: 
http://studyjams.scholastic.com/studyjams/jams/science/human-body/skeletal-system.htm

❓Review Questions

1. Which function of the skeletal system would be especially important if you were in a car accident?
  1. storage of minerals
  2. protection of internal organs
  3. facilitation of movement
  4. fat storage
2. Bone tissue can be described as ________.
  1. dead calcified tissue
  2. cartilage
  3. the skeletal system
  4. dense, hard connective tissue
3. Without red marrow, bones would not be able to ________.
  1. store phosphate
  2. store calcium
  3. make blood cells
  4. move like levers
4. Yellow marrow has been identified as ________.
  1. an area of fat storage
  2. a point of attachment for muscles
  3. the hard portion of bone
  4. the cause of kyphosis
5. Which of the following can be found in areas of movement?
  1. hematopoiesis
  2. cartilage
  3. yellow marrow
  4. red marrow
6. The skeletal system is made of ________.
  1. muscles and tendons
  2. bones and cartilage
  3. vitreous humor
  4. minerals and fat

Critical Thinking Questions

The skeletal system is composed of bone and cartilage and has many functions. Choose three of these functions and discuss what features of the skeletal system allow it to accomplish these functions.

GLOSARY

TIP: It is always good to have a glossary or dictionary to better understand or learn a text or topic

bone
hard, dense connective tissue that forms the structural elements of the skeleton
cartilage
semi-rigid connective tissue found on the skeleton in areas where flexibility and smooth surfaces support movement
hematopoiesis
production of blood cells, which occurs in the red marrow of the bones
orthopedist
doctor who specializes in diagnosing and treating musculoskeletal disorders and injuries
osseous tissue
bone tissue; a hard, dense connective tissue that forms the structural elements of the skeleton
red marrow
connective tissue in the interior cavity of a bone where hematopoiesis takes place
skeletal system
organ system composed of bones and cartilage that provides for movement, support, and protection
yellow marrow
connective tissue in the interior cavity of a bone where fat is stored

Solutions

Answers for Review Questions
  1. B
  2. D
  3. C
  4. A
  5. B
  6. B
Answers for Critical Thinking Questions
  • It supports the body. The rigid, yet flexible skeleton acts as a framework to support the other organs of the body.
  • It facilitates movement. The movable joints allow the skeleton to change shape and positions; that is, move.
  • It protects internal organs. Parts of the skeleton enclose or partly enclose various organs of the body including our brain, ears, heart, and lungs. Any trauma to these organs has to be mediated through the skeletal system.
  • It produces blood cells. The central cavity of long bones is filled with marrow. The red marrow is responsible for forming red and white blood cells.
  • It stores and releases minerals and fat. The mineral component of bone, in addition to providing hardness to bone, provides a mineral reservoir that can be tapped as needed. Additionally, the yellow marrow, which is found in the central cavity of long bones along with red marrow, serves as a storage site for fat.
CREDITS:
 THE Q&R IS NOT MY IS OF:https://opentextbc.ca/anatomyandphysiology/chapter/6-1-the-functions-of-the-skeletal-system/
THE VIDEO IS NOT MY IS OF:: https://3d4medical.com/exercise AND https://www.khanacademy.org/science/high-school-biology/hs-human-body-systems/hs-the-musculoskeletal-system/v/skeletal-structure-and-function
3D MEDICAL: https://3d4medical.com/apps/skeleton-system-pro
HUMAN 3.0:https://chrome.google.com/webstore/detail/human-30/meefjekipolcgabfgaclcpdkbghhmoah
 THE QUIZ IS NOT MY IS OF://studyjams.scholastic.com/studyjams/jams/science/human-body/skeletal-system.htm

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