final prep Flashcards
components of the male reproductive system
scrotum testis penis urethra accessory glands
scrotum
pouch of skin that protects the testis
divided into two portions
line dividing them is called the SEPTUM
testis
located outside the body
housed in the scrotum
needed to be outside due to temperature regulation
what is the negative effect of heat to testicles
kill off sperm
why are testicles separated by the septum
to localize infection or injury if occurred in one it may not transfer to another
how are testicles supported/protected in the scrotum
covered in skin
2 layers of muscle underneath
dartos is smooth muscle
cresmaster is skeletal layer
what is the function of muscle layers in the scrotum
muscles - dartos and cresmaster
pull the testes upward against the body to keep them warm and to save them from freezing
the cresmaster is a branch of the internal oblique muscle of the abdomen
where to the blood vessels, nerves, arteries and veins run through
spermatic cord
where does the spermatic cord run through
the inguilinal ring
if you cause injury or hernia occur do to muscle opening from where testis drop - ring is a weak point for males
tunica vaginalis
layer of a serous membrane formed from the peritonitum outside the body surrounding the testical previously was a internal serous membrane
tunica albugina
sub divides into lobules, draws inwards + makes a division in lobules the SEMINIFERIOUS TUBULE
seminiferious tubule
is there to create sperm from day to day
the journey of sperm
sperm is created in the seminiferious tuble,
once made the go to the straight tubule, then to the retee teste —- movement possible due to smooth muscle contraction, move to efferent ductus to epidymis ( mature in the epidimysis) - once ready to leave they go to the ductus deferns
layers of reproductive system
mucosal
muscularis
adventia
where do sperm enter when they are ready to leave the body
ductus deferns
does the epididymis move sperm better then the ductus deferns
no! the ductus deferens is more efficient at moving sperm
ductus deferens
takes sperm from testicle to the outside world has three layers of muscle longitutidional circular longitutidonal
urthera runs through the center
penis is broken down into 3 parts
root - attached to body
shaft - the main body of the penis
glands penis - head
penis function
introduce sperm to female
in a cross section of the penis there are 3 compartments
a pair of corpora cavernous - have large blood vessels to cause irrection - spongy filled with blood to create pressure (x2)
corpa spongisosum - where the urethra runs through
controlled by the parasympathetic division of the nervous system
what is a joint
where two or more bones attach
they help with movement, mobility, and shock absorption
joints hold us together - act a connection
how are joints classified
by structure and movement type
types of joints
fibrious
cartligionious
synovial
what is the most common kind of joint
synovial
what are the varieties of joint movements
synarthroses - immoveable
amiarthroses - slightly moveable
diathroses - freely moveable
fibrous joint
lots of fibres
dense connective tissue - regular or irregular
gives tensile strength
rare joint type
lack a joint cavity
bones will be attached and held together by collagen fibers
cartilaginous joints
held together by hyaline or fibro cartilage
have no joint cavity
collagen fibers present
synathroses or ampiarthroses
synovial joints
have a large joint cavity different in structure freely moveable a lot of movement occurs have synovial fluid inside them
bones meet at the ends and are covered in articular fibres
dense regular or dense irregular tissue
what is the capsule called that holds synovial joints together
articular capsule
common movements used by synovial joints (8)
gliding flexion extension hyper extension abduction adduction circumduction rotation
gliding
occurs when one flat bone surface glides over another without rotation
wrist movement
flexion
bending movement along the sagittal plane decreasing the angle of the joint - example bending the head and neck forward to make the angle smaller
extension
reverse of flexion - increases angle of join, typically straightens a flexed limb
hyper extension
movement past the anatomical position - a further branch of extension
abduction
away from the midline along the frontal plane - abduction away
adduction
moving toward
movement of a limb toward the body midline
circumduction
is moving a limb so that it describes a cone in space
rotation
turning of a bone on its own long axis - turns towards or away from the body
how do you get movements to occur in a joint?
attach the joint to a muscle
what kind of tissues make up a ligament and why ?
bbbb
dense irregular fibers
run in one direction
dense irregular fibers
run in multiple directions
what direction do joints move in
many
synovial membranes
are made of connective tissue LOOSE AREOLAR
have lots of matrix
good at transporting
have lots of mast cells
macphrophages are present to help with imflammation
this reduces friction to elimate wear and tear and debrie from becoming present.
does phagocytosis occur in synovial joints
yes the synovial fluid lubricates the joint to reduce friction
why are synovial membranes made of loose areolar connective tissue?
the LA CT filters blood to produce synovial fluid
what is the consistency of synovial fluid?
egg white
where does synovial fluid go?
fluid is absorbed by hyaline cartilage
where do chondrocytes and extracellular matrix go
matrix is absorbed into the end of your bones - squeezes in and out as you are relax or stress your joints (sitting vs standing)
functions of muscles
movement warmth (skeletal) facial expressions (movement) protection stabilization of joints maintain posture
type of muscle tissue
smooth
skeletal
cardiac
cardiac muscle
heart - movement
skeletal muscle
bones - movement
smooth muscle
reproductive, urinary, skin, blood vessels, respiratory, digestive tract - used for movement
general characteristics of muscles
packed full of proteins have a good blood supply tightly packed cells - very cellular not much matrix lots of nerves glucose + ATP
temporalis
L - by the side of the head lateral to the eyes
O - temporal fossa
I - coronoid process of the mandible via a tendon that passes deep to the zygomatic arch
M - closes the jaw - elevates and retracts the mandible
external oblique
L - lateral abdominal muscles
** largest most superficial of three muscles **
O - by fleshy strips from outer surfaces of lower 8 ribs
I - most fibers insert into lined alba some insert into pubic crest
M - rotating trunk + flexing laterally
deltoid
L - shoulder muscle
O -embraces insertion of the trapezious lateral to the clavical
I - deltoid tuberosity of humerous
M - prime mover of the arm abduction when all fibers contract
Pectoralis major
L - large fan muscle; superior portion of the chest
O -sternal end of clavicle - strunum cartilage of ribs 1-6
I - insert to short tendon into intertuburclular sulcus and greater tubercle of humerus
M - abducts and medially rotates arm
latissimus dorsi
L - lower back broad flat muscle
O - indirect attachment of lower 6 thoracic vertebrae, lumbar vertebrae lower 3-4 ribs, iliac crest
I - spirals around teres major to insert floor of intertubercular sulcus
M - prime mover of the arm extension. powerful arm abductor medially rotates arm at shoulder
triceps brachii
L - large fleshy muscle posterior part of the arm (3 headed origin)
O - long head infraglenoid tubercle of scapula, posterior shaft of humerus, medial head distal to radial groove
I - by common tendon into olecranon of ulna
M - powerful forearm extension
gluteus maximus
L - forms a mass of buttocks - bum
O - dorsal illium, sacrum, and coccyx
I - gluteal tuberosity of femur iliotubial tract
M - major extensor of thigh
biceps femoris
L - most lateral muscle of the group arises from two heads
O - ischial tuberosity (long head); linea aspera, lateral supraccdynlar line, and distal to femur (short head)
I - common tendon passes downward and laterally (forming lateral border of popliteal fossa) to insert head of fibula and lateral condyle of tibia
M - extends thigh and flexes legs; laterally rotates leg especially when knee is flexed
what are the three types of muscles
smooth
cardiac
skeletal
skeletal muscle
**** also called striated muscle **** due to the appearance of stripes have lots of protein fibers actin and miacin are present cause muscles to contract (slide past eachother) long + thin muscles overlap each other they are multinucleated (an advantage) aids in coping of RNA and protein fibers cylindrical voluntary control attached to bones or in the skin
cardiac muscles
striated uni nucleated (one per cell) actin +myocin - cause contactions overlapping filaments intercalated disc present - where they join together cells can branch located in the walls of the heart interdiginate at specialized junction
3 major difference between cardiac and skeletal muscles
- nucleus - one per cell - cardiac, where as skeletal muscle is mulitnucliated
- cardiac can branch, where skeletal cannot
- intercalated discs present in cardiac muscle
smooth muscle
don't have striations not over lapping proteins have actin and myosin organized differently involuntary unicellular located in blood vessels, digestive tract, urinary, reproductive forms sheets and propels stuff walls of hallow organs
actin + myosin
fibers in all muscle cells
these allow contractions of the muscle
are arranged in tidy lines, fibers slide over each other * causing contractions
skeletal muscles are named by
location shape size (s, m, l) directions of fibers origin attachment function
neuroglia cells
astrocytes - wrap around capillaries
- make them impermeable - CNS
microglial cells - act like macphropages
- CNS
ependymial cells - circulate cerebro spinal fluid
- CNS
schwan cells - speed up action potential
- PNS, make up the myelin sheath
neurons
are responsible for electrical messages being sent
what are the 3 parts of neuron
- dendrites - 100’s
- body (cell) - 1
- axon - 1
dendrites
collect info - inwards
cell body
nucleus, mitochondria (all organelles)
axon
generates electrical messages action potential - out
characteristics of nervous tissue
has lots of cells not much ECF neurons or neuroglial cells extracellular matrix very vascular - uses tons of energy keep toxins away from brain tissues
the brain and spinal cord are protected by
cerebrospinal fluid and 3 meninges
cerebrospinal fluid
protects - cushions the brain
provides nutrients to the brain
made by filtering blood
makes the brain lighter and able to float
meninges of the brain (3)
protect the brain - thin membranes separated by fluids
meninge layers
dura mater
arachnoid mater
pia mater
mininge layer - dura mater
2 layers of connective tissue
fibrous
broke into peritoneal layer - attaches the bone to skull and then lower layer is the menigal layer - helps to hold the brain in place
meninges layer - arachnoid mater
single layer separated by a small space called subderal space —-> no cerebrospinal fluid
meninges layer - pia mater
stuck onto the brain follows the grooves and into all folds of the brain
what are the spaces in the brain meninges called ?
sagittal sinus - filled with venous blood - collected + pool, drains back to juggler veins heart and play a role in circulation of cerebrospinal fluid
space between arachnoid mater and pia mater is called
subarachnoid space - houses cerebrospinal fluid has lots of blood vessels and astrocytes as well
functions of the nervous system
- brings in information
- sends information out
- processes information
sensory receptors
eyes, ears, nose
afferent
sensory nerve information in - division of the CNS
efferent
sensory nerve information out - division of the CNS
effectors are
muscles or glands
autonomic nerves =
involuntary - goes through cardiac and smooth muscle glands
how is the nervous system divided
CNS = brain and spinal cord
PNS – senory (afferent) —— motor (efferent)
l
somatic autonomic
l
sympathetic parasymphetic
two principle types of cells in the nervous system
neurons - transmit messages, electrical messages, create action potential
neuroglial cells - supportive cells
- found in the CNS
astrocytes, microglial cells, ependymal
brain holes are called
ventricles - they are fluid filled spaced where you make cerebrospinal fluid
CSF is made by
choroid plexus
astrocytes control
vast amounts of selectively permeable capillaries
blood brain barrier
brain is made of simple squamous epithelium - joints of cells are leaky astrocytes keep junctions of cells tight
substances that pass through are small and non polar substances - alcohol and drugs
what are the spinal regions
cervical thoracic lumbar coccygeal sacrum
what are the 12 pairs of cranial nerves ?
***** refer back to chapter summary **
what are the functions of the cardiovascular system
circulates blood
provides oxygen and nutrients and amino acids around the body and away from the heart
helps aid in the digestion and brings cO2 away
what is the pathway that blood follows in the heart
?????
the cardiovascular system is composed of
heart, blood vessels, - arteries, capillaries, and veins
coverings of the heart
serous membrane (ET) - produce serous fluid to eliminate friction
protection for the heart
- from the outside in
fibrous pericardium made of dense fibrous CT
function: strong + collagen - attaches heart - anchored
protection - prevents over load of blood
protective layers of the heart including all coverings
- parietal layers of serous pericardium - line cavity and covers the organs
- pericardial cavity is where serous fluid is stored