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Skeletal System
The skeletal system provides definite shape and mechanical support to the body, and it also helps in movement and locomotion. Ask questions about the skeletal system and bones here.
14,490 Questions
What is the bat-shaped bone extending behind the eyes to form the base of the skull?
The bone you are referring to is the sphenoid bone. It is located at the base of the skull and helps form the structure of the eye sockets.
* deep socket in the coxal bone
* formed where the ilium, ischium, and pubis bones fuse
* the head of the femur, the thigh bone, fits in the acetabulum
Acetabulum is the area on the pelvis where the head of the femur joins the pelvis. It is a concave surface that allows for the forming of the hip joint which allows you kick your leg up.
The hip has these two bowl shaped regions into which the upper femur fits. This is the hip joint. That bowl shaped region is called the acetabulum.
How do hormones affect bone growth?
Bones grow based on stress levels. When there is a lack of estrogen or testosterone bones tend to grow weaker in some people. Many bone supplements contain estrogen or testosterone hormones that cause tension in the bones, thus causing osteoblasts (bone forming cells) to build strong bones.
Do some people have more bones than others?
No, some people are missing appendages or have more than their share (e.g., polydactyly) and some people have fewer plates in their skulls than others. Some people are born with extra ribs and have varying numbers of sesamoidal bones (the knee cap is a sesamoidal bone and some people have had it removed surgically). Children have more bones than adults because their bones have not completely fused.
Where was the oldest skeleton found?
Scientists recently announced the discovery of the oldest fossil skeleton of a human ancestor. The find reveals that our forebears underwent a previously unknown stage of evolution more than a million years before Lucy, the iconic early human ancestor specimen that walked the Earth 3.2 million years ago.
The centerpiece of a treasure trove of new fossils, the skeleton---assigned to a species called Ardipithecus ramidus---belonged to a small-brained, 110-pound (50-kilogram) female nicknamed "Ardi."
Ostioclasts are the cells that lay down the calcium salts that are the bony part of bone.
Ostioblasts are the cells that dissolve the bony salts.
Note : condroclasts and chondroblasts do the same thing for the collagen matrix of bone. They all work together to form and modify bone.
What are the spines on the cactus and why are they important?
Saguaro (Carnegiea gigantea)
A major function of cactus spines serve to provide protection for the cactus from the sun. At first, it is hard to believe that tiny cactus spines offer any real protection from the intense desert sun. But when you consider that a cactus can have thousands of spines and each spine provides a small amount of shade and multiply that by 1,000 - well it becomes easier to believe that spines really do offer some protection from the sun for the skin of the cactus.
What is an example of a long bone?
Examples of long bones are the femur, tibia, and fibula of the leg, the humerus
What are the four major sutures of the skull?
Squamous suture (separates the temporal bone from the parietal bone), Coronal suture (separates the frontal bone from the parietal bone), Sagittal suture (separates the parietal bones) and the Lamboid suture (separates the occipital bone from the parietal bone)
There are little muscles where yours ribs connect to your spin in your back. If you tear on of these muscles it is very painfully I can hurt to even breath. I takes about a week and a half for the pain to stop without treatment.
What could a lump on the jaw bone be?
The best reason you have to make an urgent appointment with your doctor.
yes consult a doctor or GP just to get it checked it may not be something serious i had the same problem but mine went in a couple of days but if it is there for longer than a week go to the doc. x
What is the advantage of having a softer material between the bones?
If bones did not have a softer material (cartilage) between them, then they would grind against each other, which would cause damage. The bones would wear out at the joints.
The arms and legs are each considered limb. They have three bones but the hands and feet are considered part of each limb as well and there are 27 in each hand and foot. In total there are 3+27 = 30 for each limb.
The upper teeth are held by what bones?
The manbidle, or jaw bone, holds the inferior teeth and the maxilla, the bone behind the top lip, holds the superior teeth.
estrogen decreases osteoclast(bone reduction remodeling) which decreases osteoporosis. promotes osteoblast activity in bone formation. keeping calcium in bones and keeping bone density/integrity.
What are some diseases caused by the bone cell?
Some diseases caused by bone cells include osteoporosis (bone density loss), osteogenesis imperfecta (brittle bones), and Paget's disease (abnormal bone remodeling). These conditions can lead to increased fractures, deformities, and pain in affected individuals.
What happens when a ligament that attachs at a joint are torn as the bone slips out of place?
When a ligament tears as the bone slips out of place, it can lead to joint instability and reduced function. This can cause pain, swelling, and limited range of motion in the affected joint. In severe cases, surgery may be required to repair the torn ligament and restore stability to the joint.
What is derived from bone marrow?
Blood cells, including red blood cells, white blood cells, and platelets, are derived from bone marrow. Bone marrow is a spongy tissue found in the center of bones and plays a crucial role in the production of these blood cells.
Our body is held together by a complex system of connective tissues, such as ligaments and tendons, that attach muscles to bones and hold bones together at the joints. In addition, our skeletal system provides structure and support for our body, helping to maintain its shape and function.
Which hormone stimulates osteoclasts in the raising of calcium levels in the blood?
If you are looking for the one hormone that does this, then the answer is parathyroid hormone (PTH), produced in the parathyroid glands.
A more technical description is given below:
Three hormones act in the body to increase blood calcium levels to normal. These hormones are 1,25-Dihydroxycholecalciferol, parathyroid hormone (PTH), and calcitonin that originate respectively from the liver and kidneys, parathyroid glands, and thyroid glands. The first, 1,25-Dihydroxycholecalciferol (active vitamin D3), serves to increase calcium absorption from the intestine. The second, PTH, dissolves bone into the blood. The third, calcitonin, prevents the bone-derived calcium from being resorbed ("reabsorbed") into the bone from which it came via PTH. To summarize, these three hormones act in concert to raise calcium levels via external and internal routes.
References: Ganong's Review of Medical Physiology, 23eKim E. Barrett, et. al. Chapter 23: Hormonal Control of Calcium & Phosphate Metabolism & the Physiology of Bone
What bone serves as a bridge uniting the cranial and facial bones?
Where one cranial bone meets another is referred to as a suture line.
Forms embryonic skeleton and the surface of the bones at the joints reinforces the trachea?
Cartilage forms the embryonic skeleton before being replaced by bone. Additionally, cartilage at joints provides a smooth surface for movement and helps absorb shock. In the trachea, cartilage rings provide structure and prevent collapse during breathing.
What is the superiormost margin of coxal bone?
Iliac Crest
This is the superior margin of the coxal bone.
