University of the People HS 2211'- Anatomy & Physiology Written Assignment Unit 2 September 20, 2022
Pick a joint from the human body, then carefully analyze its anatomy. Describe how the skeletal characteristics of the joint affect the movement or lack thereof.
The "Pivot Joint" among the joints in the human body Is the one I have chosen to
examine in detail since it is also the most basic and crucial joint in the body and is
defined as the rounded end of one bone precisely fitting into a ring produced by the
other bone. Additionally, this enables fundamental rotational movement functions, such
as those of the wrist, neck vertebrae, forearms, and knees.
The pivot joint, on the other hand, is a joint that only permits slight rotation about its own
axis and is made of a second bone and an adjacent ligament (trochoid-joint). On the
one hand, the ring spins around the cylinder at some joints, whereas in others, the
cylinder rotates inside the ring. The joint (Pivot) that connects the Atlas and the axis
under the skull and permits side-to-side head rotation is an example of this joint. The
joint also enables the forearm bones to act in a twisting motion against the upper arm,
which is used to unscrew the lids of jars, according to The Encyclopedia Britannica
Editors (2020).
a well-known fibrous tissue that permits bone rotation in the pivot ring and is later
changed into a particular kind of cartilage to provide a surface that covers and
safeguards the ends of the linked bones. Two or more bone ends and their cartilage are
hermetically sealed by a membrane to form a sort of living capsule (Encyclopedia
Medicine, 2020). Additionally, there is a little space between the two bones' cartilages
inside the membrane capsule, and this space is filled with synovial fluid, a pale yellow
fluid that lubricates every joint in the human body. In order to perform a specific function
of movement, the body can make joints slide over one another smoothly thanks to
synovial fluid, which prevents the bones from crushing against one another and
automobile engine, for example, is an analogue of this fluid because it prevents lust for
jamming between the metals.
Furthermore, due to the cartilage at the end of the bone lacks and the other element
nutrients that keep the cartilage robust, alive, and healthy. This is because some of the
fluids are absorbed by the cartilage.
The three physiological words described the way the human joint system is
functionally organized.
1. Diarthroses; The joint in question can move freely. Additionally, it permits
movements contained to a single anatomical plane, such as those at the wrist
joint (Betts et al., 2013).
2. Synovial; Particularly in synovial joints is synovial fluid prevalent. This can be
found in the knee joint and its main function is to reduce friction and smooth
rotational motion (Betts et al., 2013)
3. Multiaxial; Similar to hip and shoulder joints, This joint permits movement in
several directions