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3 years ago

List the three primary components of the axial skeleton.

Biology

1 answer:

FinnZ [79.3K]3 years ago

7 0

Answer:

Three primary components of axial skeleton are skull, vertebral column and ribs.

Explanation:

Axial skeleton forms the central axis f the body. Three primary component of axial skeleton are:

Skull: Skull protects the brain and supports the face structure. Twenty two bones are present in the skull. Two main categories of skull bone are cranial bone and facial bone.

Vertebral column: Vertebral columns support and protects the spinal cord. The vertebral column serves as the attachment site for the muscles and neck.

Ribs cage: Ribs cage is also known as thoracic cage and includes the structure of sternum, ribs, coastal cartilage and thoracic cartilage. Ribs consists of twelve bones.

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Why are there more debates then answers when discussing stem cell research

Talja [164]

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3 years ago

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Rabbits, turtles, fish, humans, and whales all share certain characteristics but also differ from each other. All of these speci

Delvig [45]

The levels of organisation are

Domain: Eukarya

Kingdom Animalia

Phylum :Chordata

Explanation:

They all share these levels of organisation because;

for the Domain Eukarya, they have;

→multi-cellular cells containing nucleus; and other membrane bound organelle.e.g Mitochondrial.

→their DNA located in the nucleus packaged as linear chromosomes bounded by histone proteins.

→mode of reproduction which is sexual.

They share Kingdom Animalia because;

→they have multi-cellular, specialised cells, bounded by plasma membranes.

→they have specialized tissues, organs, and system.

→they all undergo heterotrophic mode of nutrition as evident in the question 'that they must consume plants and animals as source of energy'

→they exchanged communication by nervous ssytem and 

→ use homeostatic mechanisms to regulate water balance of the body through the kidney.

→Humans,Rabbits,and whales are VIVIPAROUS; they give birth to young ones alive.

→Most fishes lay eggs to reproduce, they are said to be Ovoviviparous.

They belong to phylum Chordata because ;

→they all have noto chord; which serve as template for axial skeleton.

dorsal hollow nerve cord -template for the brain and spinal cord

→pharyngeal slits- templates for gill aches in bony fishes and components of inner ear in land animals.

→ tail length varies in these organisms.

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3 years ago

Please use kid friendly words lol

prohojiy [21]

Mantle convection causes tectonic plates to move around the Earth's surface.

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3 years ago

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What are the two parts of the peripheral nervous system

Elenna [48]

Answer:

the somatic nervous system and the autonomic nervous system

Explanation:

The somatic nervous system is responsible for both sending and receiving sensory and motor information to the central nervous system.

The autonomic nervous system is responsible for regulating involuntary body functions. For example, heart rate, breathing, and digestion.

5 0

3 years ago

What distinguishes an amniotic egg from eggs laid by other animals, including fishes, amphibians, and invertebrates?

PIT_PIT [208]

The difference between an amniotic egg and eggs laid by other animals is : Absence of Membrane ( amnion ) and absence of larval stage

<h3>Characteristics of an amniotic egg</h3>

Eggs laid by amniotes are different from other eggs laid by fishes, amphibians and invertebrates in that they lack a membrane and a larval stage. the shell of the amniotic egg protects the embryo in the absence of a membrane. The shell also allows for the exchange of oxygen and carbon dioxide between the the embryo and the environment.

Hence we can conclude that The difference between an amniotic egg and eggs laid by other animals is : Absence of Membrane ( amnion ) and absence of larval stage

Learn more about amniotes : brainly.com/question/19158601

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2 years ago