What is the purpose of chondrocranium?
The chondrocranium is the large single element of the head skeleton (Figure 3.2). It surrounds and provides support for the brain and sense organs. The scoop-like rostrum projects anteriorly and contains the precerebral cavity.
What is chondrocranium made of?
The chondrocranium in different species can vary greatly, but in general it is made up of five components, the sphenoids, the mesethmoid, the occipitals, the optic capsules and the nasal capsules.
Where did the chondrocranium come from?
Neurocranium (Chondrocranium) is from neural crest cells and mesodermal mesenchyme. It can remain catrilage or become replacement bone. We will study three groups of bones the Occipitals, the Sphenoids and the Ethmoids. Splanchnocranium comes from neural crest cells and is either cartilage or replacement bone.
Which bone develops from the chondrocranium?
The skeleton of the head is made of the chondrocranium (neurocranium) supporting the brain, flat bones of membranous origin which roof the skull and the viscerocranium which supports the pharyngeal arches. The embryonic precursors of cartilage of the vertebrae and ribs are contained within the somite.
Do sharks have a splanchnocranium?
The shark has a chondrocranium and splanchnocranium but no dermatocranium. Its skeleton is also cartilaginous as opposed to being made of bone. The chondrocranium is a single piece in the shark.
Which is the strongest bone in human body?
The femur is one of the most well-described bones of the human skeleton in fields ranging from clinical anatomy to forensic medicine. Because it is the longest and strongest bone in the human body, and thus, one of the most well-preserved in skeletal remains, it makes the greatest contribution to archaeology.
Does cartilage contain blood vessels?
Unlike most tissues, articular cartilage does not have blood vessels, nerves, or lymphatics. It is composed of a dense extracellular matrix (ECM) with a sparse distribution of highly specialized cells called chondrocytes.
Do mammals have a chondrocranium?
The diversity of fully formed chondrocrania is stunning, particularly in the nasal region. Mammals are mostly macrosmatic, i.e. with a well-developed nasal region, and differ significantly in their nasal anatomy. The cupula nasi anterior is the rostral most portion of the chondrocranium and the nasal capsule (Fig.
Does the chondrocranium protect the Dermatocranium?
It has been hypothesized that the chondrocranium serves as a scaffold for the later development of dermal bones in the mouse dermatocranium (Kawasaki & Richtsmeier, 2017), a relationship that is accepted for the lower jaw and Meckel’s cartilage, an element of the pharyngeal skeleton.
Do humans have a Dermatocranium?
The dermatocranium is the portion of the cranium that is composed of dermal bone, as opposed to the endocranium and splanchnocranium, which are composed of endochondral bone.
Do amphibians have chondrocranium?
The chondrocranium, visceral skeleton, and dermal bones that are present in the head region of fishes are also present in amphibians.
What is the function of the chondrocranium?
The chondrocranium is the large single element of the head skeleton (Figure 3.2 ). It surrounds and provides support for the brain and sense organs. The scoop-like rostrum projects anteriorly and contains the precerebral cavity. The cavity communicates posteriorly with the cranial cavity by way of the precerebral fenestra.
How effective is chondroitin for the treatment of osteoarthritis of the hand?
Because there have been only a few relatively small studies, no definite conclusions can be reached. A 6-month trial of chondroitin in 162 patients with severe osteoarthritis of the hand showed that it may improve pain and function.
What is the connection between glucosamine and chondroitin?
Glucosamine and chondroitin are structural components of cartilage, the tissue that cushions the joints. Both are produced naturally in the body. They are also available as dietary supplements.
Where does the hyomandibular foramen enter the chondrocranium?
The hyomandibular foramen pierces the chondrocranium at the anteroventral part of the otic region. The occipital region forms the posterior part of the chondrocranium. The large median opening is the foramen magnum. An occipital condyle lies on either side and just below it.