The five chordate characteristics are nanochord, pharynx with slits, endostyle or thyroid gland, hollow dorsal nerve cord and postanal tail. All chordates have these features sometime in their lifetimes. Theses are characteristics that appear sometime during development and either disappear or remain into adulthood. The nanochord is a primitive backbone. It lies dorsal to the coelom and under the brain and spinal cord.
The shallow oval pocket of the scapula is the Glenoid cavity where the head of the humerous sits. B) Which bone is Stefan referring to as the “collarbone”? The bone that Stefan is referring to is the clavicle. C) Which surface markings could Stefan use to distinguish the right and left humerous? A surface marking that can distinguish left from right, is the medial epicondyle.
Osteochondroma of the structure is more special, and can be divided into three layers. surface as a thin layer of fibrous tissue, namely cartilage, and connected to the adjacent periosteum; the middle is a cartilage cap slightly by the pale blue hyaline cartilage, whose thickness varies with the patient's age, the younger, cartilage cap thicker; in adults, very thin cartilage cap, or almost disappeared in the 1 ~ 5mm thickness and more between the microscope and the normal soft growth plate is similar to t he cartilage surface than immature cells and matrix organization, the more near the bottom The more mature, at the junction of mature cartilage cells were arranged in columnar, and calcification and ossification of the phenomenon. the main body of the tumor at the base, often accounting for much of the tumor, the composition of sponge-like cancellous bone, trabecular bone and more fibrous tissue between,
Which bone is Stefan referring to as “collarbone”? The clavicle is also referred to as the collarbone is a slender, s-shape. This bone is a long bone that serves as a strut between the scapula and the sternum. C. Which surface markings could Stefan use to distinguish the right humerus from the left? Stefan was able to distinguish easily between the right humerus and left using their obvious landmarks: the head, deltoid tuberosity, and olecranon fossa.
This flattened part of the skull and the depressed region above the zygomatic arch constitute the temporal fossa which in life is occupied by the temporalis muscle. 1 6. ANS -B: The middle meningeal artery and accessory meningeal artery are branches of the max illary artery that enter the cranial cavity through foramen spinosum and foramen ovale. 1 7. ANS -B: The buccal branch of the facial nerve is the motor fo r the buccinator muscle.
The distinguishing characteristics of the vertebrae composing the vertebral column are noted below. Correctly identify each described structure by choosing a response from the key. Key: a. b. c. atlas axis cervical vertebra—typical 1. 2. 3.
The symptoms usually began during childhood. The child would start to have very deformed toes and fingers. Possibly a missing joint or simply presenting with a notable lump at the major joint. The first Flare-up that leads to the formation of FOP bones usually starts around age 10. The bone growth progresses from the top downward, just as bones grow in fetuses.
Provides skeletal support. * b. In most vertebrates, it’s replaced by a jointed skeleton. * c. Remains of the notochord exist as disks between the vertebrae. 2.
These include fissure, foramen, fossa, sulcus, meatus, process, condyle, facet, head, crest, epicondyle, line, spineous process, trochanter, tubercle, and tuberosity. B. Why are Liu and Hassan surprised to find a metopic suture on an adult skull? In which skull bone do metopic sutures occur? b. Liu and Hassan were surprised to find metopic suture on an adult skull because right after birth the left side and right side of the frontal bone are united by the metopic suture.
Stegosauruses had 17 bony plates that were embedded in its back. The arrangement of these plates was unknown until a 1992 Stegosaurus find in Colorado. The function of these plates is uncertain. The plates were made of bone which was not solid, but was filled with tube-like tunnels. The plates ran along the Stegosaurus' back and tail in two rows, and the plates alternated in alignment.