Topics in BiologyMale Reproductive System Male accessory sex organs Food Chain, Food Web and Food Pyramid Skeleton and Type of Skeletal Materials Bones and Types of Bone Bones and Type of Bone part 2 Red Blood Cells and Hemoglobin Tropical Rainforest and Savanna with their characteristics Desert and Swamp Forest with their characteristics Autotrophic mode of Nutrition
Academic Questions in Biology
The living cells that makes up cartilages are called _____.
Which of the following statement is incorrect with regards to chitin?
Which of the following is NOT a function of the human skeleton?
Organisms that manufacture their own food through the help of sunlight or chemicals are best referred to as _____.
Organisms that begins a food chain and also manufacture their food through photosynthesis are best referred to as _____.
Recall that bones are composed of living cells called osteocytes and non-living cells (minerals salts and collagen fibres). In a previous article, we explained the classification of bones based on shape. In case you missed our explanation on bones and the above classification; Please read on it here.
In this article, we will continue to explain the various types of bone based on their classifications.
We already know that all bones are composed of the same materials, that is, osteocytes or bone cells, hydroxyapatite (Calcium phosphate), Calcium carbonate, protein and collagen fibres. Based on how the contents of the bone is structured, we may classify them into the followings:
A compact bone has more of bone cells together with minerals (hydroxyapatite); and as a result, only little space or cavity is present within it. They form the hard external layer of all bones and will typically surround the medullary cavity (which houses the bone marrow). The compact bone function to strengthen and protect the inner matrix of the bone. Compact bone contains osteons. The haversian systems are present within the compact bone.
Note: Osteons are composed of osteocytes and minerals (hydroxyapatite) connected by a canaliculi which transports blood.
A compact bone is sometimes called cortical bone.
The structure of spongy bone is such that empty spaces or cavities are more when compared to the bony tissue (osteocytes, hydroxyapatite and fibres). They form the internal layers of bones; unlike compact bone which forms the external layers. Spongy bone tissue does not contain osteons that constitute compact bone tissue, rather they are made of trabeculae. When we examine the head of long bones (epiphysis), we will observe that within it are spongy bones. Here, they function to reduce the density of the epiphysis, thus allowing for compression when such bone is stretched.
Note: A spongy bone can be easily broken and chewed to extract its fluid. In Nigeria, it's fondly referred to as “biscuit bone”.
Another name for spongy bone is Cancellous bone
They are found only in fetus and are composed mainly of fibres.
We the 3 types of bones with regard to how they are developed; they are:
Ossification of cartilaginous bone begins from the cartilage. The bones of the upper limbs, lower limbs and rib cage are all cartilaginous bone.
The upper limb is the region from the arm through the fingers
The lower limb is the region from the thigh through the toes
These bones are very likely to in a fetus (when the baby is still inside the mother’s womb. The process through which they ossify is termed intra-membranous ossification. The skull and face bones are membranous bones.
Examples are collar bone (clavicle), occipital bone and the mandible.
These bones are classified base on whether they are medial (towards the midline) of the body or lateral (away from the midline of the body). We can categorize them into 2:
The axial skeleton in humans is found along the midline of their body. They include the following bones:
Image Credit: Bikramjenn
The ribs, sternum and the thoracic vertebra form the rib cage or thoracic cage.
The appendicular skeleton is located lateral (away) from the body. They include the:
Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 7 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.
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Amazing facts in Biology
Male Seahorses actually give birth to their young ones, NOT the female
All babies are born with blue eyes
NOTABLE POINTS IN Biology
During strenuous exercises like sprinting or 🏃 running, your body may actually work in the shortage of oxygen. During this time, your body owes oxygen (called oxygen debt) and it must be replenished or repayed after the exercise is stopped. This is why you breathe excess of oxygen after you stopped the exercise.
This is the concept of anaerobic respiration
A food Chain is a diagram that shows the relationship between plants and animals within a habitat on the basis of how they rely on each other for food.
Note: Habitat is a place where an organism live. It is of three types: