ANIMAL TISSUES. 1. Epithelial tissue. They form the skin and line hollow organs of the body, such as the gut Some epithelial cells have secretory functions Cells are aligned over a connective tissue. They don’t have blood vessels and nerves
Epithelial tissues are sheets of densely packed, tightly connected cells that cover inner and outer body surfaces
Keratinsiz çok katlı yassı epitel- AĞIZ İÇİ
Çok katlı değişken epitel-İDRAR KESESİ
Keratinli çok katlı yassı epitel- DERİ
Exocrine glands - Endocrine glandsSalivary gland, digestive glands– hormonal glands(hypophysis,thyroid), pancreas,
Dilde tat alma epiteli
Deride dokunma duyu epiteli
In cartilage, the cells (chondrocytes), which lie in small chambers called lacunae, are separated by a matrix that is solid yet flexible. Unfortunately, because this tissue lacks a direct blood supply, and nerve endings it heals very slowly. The three types of cartilage are classified according to the type of fiber in the matrix.
Periosteum- regenerates the bone tissue
Bone is the most rigid of the connective tissues. It has an extremely hard matrix of mineral salts, notably calcium salts, deposited around protein fibers.
The outer portion of a long bone contains compact bone.
Compact bone consists of many cylindrical-shaped units called an osteon, or Haversian system. In an osteon, matrix is deposited in thin layers called lamellae that form a concentric pattern around tiny tubes called central canals. The canals contain nerve fibers and blood vessels. The blood vessels bring nutrients to bone cells (called osteocytes) that are located in lacunae between the lamellae. The nutrients can reach all of the cells because minute canals (canaliculi) containing thin extensions of the osteocytes connect the osteocytes with one another and with the central canals.
The ends of a long bone contain spongy bone, which has an entirely different structure. Spongy bone contains numerous bony bars and plates called trabeculae separated by irregular spaces. Although lighter than compact bone, spongy bone is still designed for strength. Like braces used for support in buildings, the solid portions of spongy bone follow lines of stress. Blood cells are formed within red marrow found in spongy bone at the ends of certain long bones.
2. Kanında sadece B antikoru bulunan bir kişinin kan grubu nedir?
3. AB rh – kan grubuna sahip olan kişinin antijen ve antikorlarını belirtiniz.
Smooth muscleSkeletal muscle