THE OVARY. ... not elastic, it must accommodate with increased length when the tissue in which it resides is stretched. The development of synovial joints involves a more extensive process: the central mesenchymal cells in the interzone undergo apoptosis to form the synovial joint cavities, whereas the peripheral cells differentiate into ligaments and dense fibrous tissue. Development of the skeletal muscle involves the differentiation of myotome cells into myoblasts. The site at which more than two bones meet are called the fontanelles (anterior, posterior, and two posterolateral). On the other hand, the lower limbs rotate 90° medially, placing the extensor muscles on the anterior surface and the big toe medially. Both congenital deformities are often asymptomatic, but may impair cardiac and respiratory function depending on the severity. As development continues, the notochord completely degenerates in the centrum, but where it persists, it enlarges as a gelatinous center. It initially consists of a number of separate cartilages that eventually fuse together. Histology, also known as microscopic anatomy or microanatomy, is the branch of biology which studies the microscopic anatomy of biological tissues. The ossicles are the first bones to become fully ossified, with their ossification beginning in the fourth month of gestation. Malformations of the sternum include cleft sternum, pectus excavatum, and pectus carinatum. Sample Decks: CT and Epithelial, Muscle And Nervous, Cardiac Show Class Histology. Chondrification involves the condensation and differentiation of mesenchymal cells into chondrocytes (cartilage cells). Presentation Summary : General principles of development The development of the larynx can be divided into prenatal and postnatal stages. Similar to the membranous neurocranium, the cartilaginous neurocranium is derived from the same sources. Recapitulation of fast skeletal muscle development in zebrafish by transgenic expression of GFP under the mylz2 promoter. Joints are classified as: The development of fibrous joints involves mesenchymal cells in the interzone to differentiate into dense fibrous tissue (i.e. Histology of Cardiac Muscle: The cardiac muscle fibres are separated from each other by the connective tissue endomysium along with blood vessels and lymphatics. Good muscle development leads to improved meat quality. The process of chondrification continues until a cartilaginous vertebral column is fully formed. The cardiac muscle fibres are not made up of one straight simple cylinder but they have got short cylindrical branches in all directions (in any dimension). The spinous, transverse, and costal processes develop as extensions from this newly assembled cartilage model. Cell death in the AER creates separate ridges for each digit forming webbed fingers and toes. Muscle Development of Livestock Animals: Physiology, Genetics and Meat Quality. They are cartilaginous during the embryonic period and undergo ossification during the fetal period. Craniosynostosis involves the premature closure of one or more sutures of the skull. Placed end to end, these sarcomeres form long bands called myofibrils. Phocomelia (seal limb) involves the absence of long bones, resulting in rudimentary hands and feet attached to the trunk and pelvis. Cells from these two edges migrate ventral to the dermatome and proliferate to form muscle cell precursors. V. Development of body musculature Derived from paraxial mesoderm (somitomeres in head, somites in neck and trunk) Somite gives rise to sclerotome , which develops into vertebral and rib bones; myotome , which develops into muscle, and dermatome , which develops into dermal connective tissue. There are 3 types of muscle (skeletal, cardiac and smooth). 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