Untitled Quiz

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Questions and Answers

What is the definition of anatomy?

The study of the physiological processes of the human body.

The study of microscopic cellular structures.

The science which studies the gross structure of the human body. (correct)

An examination of the functions of bodily systems.

Which anatomical position has the palms facing anteriorly?

Supine position

Prone position

Anatomical position (correct)

Recumbent position

Which plane divides the body into anterior and posterior parts?

Coronal (frontal) plane (correct)

Sagittal plane

Paramedian plane

Horizontal (transverse) plane

What does the term 'proximal' refer to in anatomical terms?

Near to the trunk or point of origin Signup and view all the answers

In anatomical terminology, which of the following is the opposite of medial?

Lateral Signup and view all the answers

What does the term 'superficial' mean in anatomy?

Closer to the skin or surface Signup and view all the answers

What anatomical term describes a position farther away from the head?

Inferior Signup and view all the answers

Which anatomical term is used for the body's position when lying on the back?

Supine position Signup and view all the answers

What is the function of the epiphyseal plate in long bones?

It allows for growth in length of the long bone. Signup and view all the answers

Which part of a long bone contains the marrow cavity?

Diaphysis Signup and view all the answers

What type of bone is exemplified by the patella?

Sesamoid bone Signup and view all the answers

Which term refers to the thick outer layer of compact bone found in the diaphysis?

Cortex Signup and view all the answers

What happens to the epiphyseal plate after a long bone completes its growth?

It disappears and is replaced by the epiphyseal line. Signup and view all the answers

Which bone classification is characterized by being bony nodules embedded in tendons?

Sesamoid bones Signup and view all the answers

What is the primary purpose of the periosteum?

To protect the bone and provide attachment points. Signup and view all the answers

What distinguishes irregular bones from other types of bones?

They have complex shapes and do not fit into other classifications. Signup and view all the answers

What is the term used for bones that are shaped like a column and are longer in one dimension?

Long Bones Signup and view all the answers

Which characteristic defines proximal regarding bone structure?

Near to the trunk Signup and view all the answers

Which classification of bones is based on their location in the body?

Regional Classification Signup and view all the answers

Which of the following is a function of bones?

Formation of blood cells Signup and view all the answers

What type of bone is primarily responsible for forming the cortical covering of all bones?

Hard Bone Signup and view all the answers

What is the primary purpose of osteology?

Study of bones Signup and view all the answers

Which term describes a bone that is situated towards the surface of the body?

Superficial Signup and view all the answers

What type of developmental classification includes bones such as the mandible and clavicle?

Mixed Type Bones Signup and view all the answers

Study Notes

Classification of Bones

Morphological Classification: Focuses on the shape of the bone.
- Long bones:
  - Have a shaft and two ends.
  - The shaft is called the diaphysis and is composed of compact bone.
  - The ends are called epiphyses and are composed of cancellous bone.
  - The diaphysis is covered by a membrane called the periosteum.
  - The diaphysis contains a marrow cavity filled with bone marrow.
  - The metaphysis is the region between the diaphysis and epiphysis, containing the epiphyseal plate or line which is responsible for bone growth.
- Short bones: Cube-shaped, providing stability and support (e.g., carpals and tarsals).
- Flat bones: Thin and curved, provide protection and surface area for muscle attachment (e.g., scapula, sternum, ribs).
- Irregular bones: Complex shapes, specialized functions (e.g., vertebrae, hip bone).
- Sesamoid bones: Small, round bones embedded in tendons, reduce friction and protect tendons (e.g., patella (kneecap)).

Regional Classification

Categorizes bones based on their location in the body.
- Axial skeleton: Includes the skull, vertebral column, sternum, and ribs, forming the central axis of the body.
- Appendicular skeleton: Comprises the bones of the upper and lower limbs.

Developmental Classification

Classifies bones based on their developmental origin.
- Membranous bones: Formed directly from mesenchyme (embryonic connective tissue) without a cartilage precursor (e.g., skull bones forming the vault).
- Cartilaginous bones: Develop initially as cartilage models that are later replaced by bone (e.g., bones of the limbs).
- Membrano-cartilaginous bones: Develop from both mesenchyme and cartilage (e.g., mandible, clavicle).

Structural Classification

Differentiates bones based on their internal structure.
- Hard (Compact) bone: Forms the outer layer of all bones, providing strength and rigidity.
- Spongy (Cancellous) bone: Forms the inner layer of long bone ends and the interior of other bone types, providing lightness and shock absorption.