Anatomia-kliniczna

ANATOMY OF BONES

  • Structure of Bone

    • Composed of mineralized organic matrix (ossein) and bone cells.

    • Outer layer: Compact bone, varying thickness.

    • Inner layer: Spongy bone, contains marrow spaces.

    • Bone marrow fills spaces between spongy trabeculae and in marrow canals.

    • Periosteum: connective tissue layer covering the bone, rich in nerve supply and blood vessels; aids in healing fractures.

  • Types of Bones:

    • Long bones, short bones, flat bones, irregular bones, pneumatic bones (with air spaces).

    • Axial skeleton: skull, vertebral column, rib cage.

    • Appendicular skeleton: limb bones connected to the axial skeleton through shoulder and pelvic girdles.

  • Bone Marrow Types:

    • Red bone marrow, responsible for blood cell production, located in axial skeleton and ends of long bones.

    • Yellow bone marrow found in other spaces.

  • Joint Types:

    • Synarthrosis: firm connective structures such as sutures (fibrous tissues), cartilaginous unions, and bony unions.

    • Diarthroses (free joints): joints involving synovial fluid, articular cartilage, joint capsule, and ligaments (e.g., knee joints).

SPINE AND VERTEBRAE

  • Typical Structure of a Vertebra:

    • Composed of anterior part (vertebral body) and posterior part (vertebral arch).

    • Vertebral foramen formed by these parts creates the vertebral canal for the spinal cord.

    • Intervertebral foramina allow for nerve exits between vertebrae.

  • Vertebra Types:

    • 7 cervical (C1-C7): C1 is the atlas without a body; C2 is the axis with a dens.

    • 12 thoracic (T1-T12) with rib facets.

    • 5 lumbar (L1-L5) substantial for lower back support.

  • Sacrum:

    • Triangular bone formed from five fused sacral vertebrae (S1-S5).

    • Contains sacral canal and openings for nerve pathways.

  • Coccyx:

    • Composed of 4-5 small fused coccygeal vertebrae.

RIBS AND THORACIC CAGE

  • Structure of the Thoracic Cage:

    • Composed of thoracic vertebrae, ribs, and sternum.

    • 7 true ribs attach directly to sternum, while 3 false ribs connect indirectly, and 2 float.

  • Components of Ribs:

    • Each rib has a head, neck, tubercle, and body.

  • Sternum:

    • Flat bone with manubrium, body, and xiphoid process.

UPPER LIMB GIRDLE

  • Clavicle:

    • Consists of a shaft with sternal and acromial ends.

    • Inferior surface shows grooves and tubercles for muscle attachment.

  • Scapula:

    • Identified by scapular fossa and acromion.

    • Glenoid cavity articulates with the humerus.

  • Humerus:

    • Has a shaft, proximal humeral head, and distal condyle.

  • Ulna and Radius:

    • Ulna forms the elbow joint, while the radius is lateral to the ulna.

  • Wrist and Hand:

    • Composed of 27 bones (carpals, metacarpals, phalanges).

LOWER LIMB GIRDLE

  • Pelvic Girdle:

    • Formed by two pelvic bones and the sacrum, connecting the lower limbs to the axial skeleton.

  • Femur:

    • Proximal and distal ends differentiated, crucial for weight-bearing.

  • Tibia and Fibula:

    • Tibia is medial; fibula is lateral to the tibia in the lower leg.

  • Foot Structure:

    • Composed of tarsals, metatarsals, and phalanges.

SKULL ANATOMY

  • Structure:

    • Comprised of two parts:

      • Cranial part: encloses the brain;

      • Facial part: forms facial structure.

  • Skull Features:

    • Contains numerous sutures, foramina for arteries and nerves.

NERVOUS SYSTEM

  • Basic Units:

    • Comprised of neurons and glial/support cells.

  • Central and Peripheral Systems:

    • Central (CNS): brain and spinal cord.

    • Peripheral: cranial and spinal nerves, responsible for communication with body tissues.

  • Spinal Cord Structure:

    • Composed of grey and white matter, extending to L2.

BRAIN AND VENTRICULAR SYSTEM

  • Components:

    • Includes cerebrum, brainstem, and cerebellum.

    • The ventricular system contains the lateral, third, and fourth ventricles.

SENSE ORGANS

  • General Role:

    • Specialized organs for sensory perception (e.g., olfaction, vision, hearing, taste).

  • Olfactory and Auditory Systems:

    • Olfactory pathway and the structure of the ear described in detail.

  • Visual System:

    • Structure of the eye; involved in visual perception and light transmission.

CIRCULATORY SYSTEM

  • Overview:

    • Comprises cardiovascular and lymphatic systems; responsible for nutrient and waste transport.

    • Heart has four chambers: two atria and two ventricles, with valves ensuring unidirectional blood flow.

  • Blood Flow Dynamics:

    • Major pathways for oxygenated (from lungs to tissues) and deoxygenated (return) blood.

RESPIRATORY SYSTEM

  • Components:

    • Conducts air from upper to lower respiratory tracts and facilitates gas exchange in lungs.

    • Pneumonic structures include pleura surrounding each lung and air sacs for gas exchange.