Human Embryology and Skeletal System Anatomy Facts

1. What organs derived from ectoderm?
Epidermis, hair, sebaceous glands and sweat glands, part of the nasal cavity, oral and anal, and nervous system.
2. What bodies originate from the mesoderm?
The connective tissues, adipose, cartilaginous, elastic, bone, muscles, circulatory system, part of the dermis, excretory system, peritoneum and most of the reproductive system.
3. What organs are derived from the endoderm?
The digestive tract (except mouth and anal canal) larynx, middle ear, liver, pancreas, coatings of para respiratory, bladder.
4. How is formed bone tissue?
By bone cells and bone ground substance.
5. How are they different bone cells: osteoblasts, osteocytes and osteoclasts?
Osteoblasts: bone cells of young man.
Osteocytes: osteoblasts are trapped by fundamental bone substance.
Osteoclasts: bone cells giants that have several nuclei.
6.En a bone, how does one separate the organic component (osteína) and the inorganic component (mineral salts)?
Under the action of heat, becomes osteína gelatin. To obtain the bone is subjected to the action of acid, this dissolves the calcium and freeing the osteína, which retains the shape of the bone, flexible and elastic.
7. Why is the bone of a child is different to the bone of the elderly?
Because the bone of a child has greater portion of osteína and an old man is poor in osteína.
Q # 8 a long bone Where are bone tissue and the compact? In what ways are they different?
Sponge: The flakes are thick and have no definite orientation
Compact: The lamellae are thin and have well-defined concentric orientation.
9. What bones form the axial skeleton?
Formed by the bones of the skull, spine and ribs.
10. What bones form the shoulder girdle?
The shoulder girdle is formed by the shoulder blade or scapula, and clavicle.
11. What are the bones of the skull?
Frontal, parietal, temporal and occipital
12. What are the bones of the face?
They are the ethmoid bone, sphenoid lesser wings, pterygoid wings and older.
13. How do we recognize the frontal bone?
A plane and convex bone back.