Anatomy III Flashcards
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What surrounds & protects the kidneys?
perirenal fat pads
aka perirenal fat capsule
Where do the adrenal glands attach?
to the diaphragm
Describe the cortex & medulla of the adrenal glands
C - secretes corticosteroids
M - postsynaptic sympathetic cells, neuron like, secretes epinephrine
Where are the kidneys usually located?
between T12 & L2
by pelvis in fetus
What is an ectopic or horseshoe kidney?
e - nonnormal location
h - kidneys stuck together, urine doesn’t drain as well & inc. risk of kidney stones
Describe the structure of the kidneys
- Superior pole - top
- Inferior pole - bottom
- Central hilum - for vessels
- Renal capsule (tough)
- Cortex - where filtration occurs
- Medulla - has collecting ducts w/ pyramids
- Calyces - where urine drains (minor & major)
Describes the calyces in the kidneys
where urine drains
minor - collects directly from pyramids, drain into major calyces
major - drains into renal pelvis & into ureter
renal sinus - space surrounding calyces
What is the space surrounding the kidneys?
renal sinus
Describe the ureters
muscular tube, 3-4 mm diameter smooth muscle = peristalsis retroperitoneal courses over top of iliac artery & vein where they bifurcate drain into bottom of urinary bladder
Where do stones typically develop in the ureters?
where the iliac artery & vein bifurcate
Where do the ureters drain?
bottom of the urinary bladder
What is the ureterovesical valve?
sphincter where ureter & bladder meet
opens from peristalsis from ureters
-prevents back flow b/c bladder always squeezes
What supports the urinary bladder?
supported by pubic bones & symphysis
Describe the urinary bladder
muscular wall = detrusor muscle
urachus - suspends from anterior abdominal wall by apex
lined w/ rugae
trigone - 3 openings
What is the urachus?
it suspends the bladder from the anterior abdominal wall
-was a tube as a fetus
What is a patent urachus?
urachus doesn’t completely close
Where does the uterus rest?
on top of the bladder
Describe the urethra
small muscular tube
internal urethral sphincter - smooth muscle
external urethral sphincter - skeletal muscle
(sphincters ~ 1 in.)
How long is the urethra in a woman?
1.5 in
How long is the urethra in a man?
8 in.
- Prosthetic
- Membranous
- Penile
What is contained in the antero-inferior abdominal wall?
- Pubic symphysis
- Pubic crest
- Superior ramus of pubis
What is contained in the lateral pelvic cavity?
- Obturator fascia
2. Obturator internus muscle
What is contained in the posterior pelvic wall & roof?
- Sacrum
- Anterior sacrococcygeal ligament
- Piriformus muscle
What is contained in the pelvic floor?
- Perineal membrane
- Puborectalis
- Pubococcygeus
- Iliococcygeus
- Coccygeus muscle
What are the parts of the levator ani muscle?
- Puborectalis
- Pubococcygeus
- Iliococcygeus
What arteries directly branch of the aorta?
- Inferior phrenic
- Middle adrenal
- Celiac trunk
- Superior mesenteric
- Renal
- Gonadal
- Inferior mesenteric
- Common iliac
The abdominal veins drain into the inferior vena cava except!
- Gonadal - R to IVC
L to L renal vein - Mesenteric, splenic, gastric to hepatic portal vein
Describe the male pelvic cavity
- Hiatus for urethra
- Perineal membrane to support prostate
- Hiatus for deep dorsal vein
What brings the testes closer to the penis?
gubernaculum
What is the testis peritoneum called?
tunica vaginalis
What produces sperm?
seminiferous tubules
What is the capsule around the testes?
tunica albuginea
Describe the pathway of the testes
- Seminiferous tubules
- Rete testis
- Efferent ductules
- Epididymal duct
- Vas deferens
- Ampulla
- Ejaculatory duct
- Urethra
Where does the seminal vesicle drain?
into the ejaculatory duct
provides ~75% of seminal fluid
Name the prostate lobes
- Anterior
- Median
- Lateral (2)
- Posterior
Describe the median lobe of the prostate
1st to become enlarged
hard time emptying bladder
active glandular
Describe the anterior lobe of the prostate
strengthens urethra
nonglandular
Describe the posterior lobe of the prostate
flat
palpable through rectum
highest chance for cancer
Which lobe of the prostate is 1st to become enlarged?
median lobe
Which lobe of the prostate strengthens the urethra?
anterior lobe
Which lobe of the prostate is palpable through the rectum?
posterior lobe
What is the function of the bulbourethral glands?
secretes during arousal to clean out urethra
aka Cowper’s glands
ducts into inferior aspect of urethra
Describe the corpus spongiosum of the penis
contains urethra
- Bulb
- Pedicel
- Glans
Describe the corpus cavernosum of the penis
- Scapus (shaft)
2. 2 crura - connected to ischia
Describe the arteries of the penis
- Dorsal - feeds corpus spongiosum (enters glans)
2. Deep - feeds corpus cavernosum
Where do the veins in the penis drain?
the deep dorsal vein
What are the muscles of the penis?
- Bulbospongiosus
2. Ischiocavernosus
Describe the bulbospongiosus muscle of the penis
Rhythmically contracts the urethra during climax
wrapped around base of corpus spongiosum
Describe the ischiocavernosus muscle of the penis
tenses to maintain an erection
How is the penis suspended
suspensory ligament
attaches to pubic symphysis
Describe the female pelvic cavity
- Hiatus for deep dorsal vein of the clitorus
- Hiatus for urethra
- Hiatus for vagina
What is the capsule surrounding the ovaries?
Tunica albuginea
has a bumpy surface due to follices
What causes the ovaries to descend?
the ovarian ligament
Describe the fallopian tubes
- Fimbriae - finger-like extensions that draws things into the tube
- Infundibulum - funnel
- Ampulla - most length of the tube
- Isthmus - where the tube is connected to the uterus
What is the epoophoron?
the vestigial remnants of the epididymis
Describe the tissue layers of the uterus
fundus, body, cervix
- Perimetrium - visceral serosa
- Myometrium - smooth muscle wall
- Endometrium - mucosal lining
Name the openings from the uterus
- Uterine ostium - from fallopian tubes
- Internal os - proximal cervix
- External os - cervix to vagina
What is the broad ligament?
Hold the uterus to the lateral walls
What is the round ligament?
aka ligamentum teres
enters the inguinal canal & connects uterus to labia
Name the uterine ligaments
- Broad ligament
2. Round ligament
Describe the vagina
flattened muscular tube
vestibule - entrance
fornix - top of vagina where cervix meets that can extend
rugae
What are the glands of the vagina?
- Paraurethral gland - secretes prostatic fluid
- Greater vestibular glands
Vaginal transudate - capillaries leak during arousal
What is the female version of the ampulla?
Vaginal Transudate
What is the female version of the prostate?
Paraurethral gland
What is the corpus spongiosum of the vagina?
Vestibular bulb - under labia
What is the corpus cavernosum in the female?
Clitorus
-crura, scapus & glans
In the vagina, where does the dorsal arteries drain?
vestibular bulbs
In the vagina, where do the deep arteries drain?
Corpus cavernosum
Where does the female erectile tissue drain?
into the deep dorsal vein
Describe the vagina muscles
- Bulbospongiosus - contracts during climax
2. Ischiocavernosus - maintains erectus
What is the clitorus suspended by?
the suspensory ligament
Name the bones of the pelvic gurdle
- Ilium
- Ischium
- Pubic bone
Name the lower limb bones
- Femur
- Tibia
- Fibula
- Patella
- Tarsals
- Metatarsals
- Phalanges
Name the pelvic gurdle joints
- Sacroiliac - synovial joint
2. Pubic symphysis - joint via fibrocartilage disc
Name the ligaments of the sacroiliac joints
Main: 1. anterior 2. posterior 3. interosseous sacroiliac Accessory 1. Iliolumbar 2. Sacrospinous 3. Sacrotuberous
What are the ligaments in the pubic symphysis?
joint via fibrocartilage disc
superior & inferior pubic ligaments
Name the limb joints
- Coxal
- Knee
- Tibiofibular
- Talocrural
- Transverse tarsal
- Tarsometatarsal
- Metatarsalphalangeal
- Interphalangeal
What is different about the acetabulum?
it is not complete inferiorly
it is completed by the transverse acetabular ligament
Name the ligaments of the coxal joint
- Intracapsular
- Extracapsular - iliofemoral
pubofemoral
ischiofemoral
What is a broken hip?
the neck of the femur
bad b/c no periosteum
What is a pelvic fracture?
os coxal fracture
What are the articulations of the knee?
2 btwn femur & tibia
1 btwn femur & patella
Where does the patella develop?
sesamoid bone
develops w/in tendon of quadriceps
forms groove = patellar track
Describe the menisci of the knee
- Lateral - slightly mobile
2. Medial - fixed, most commonly injured
Name the ligaments of the knee joint
Extracapsular 1. MCL 2. LCL Intracapsular 1. ACL 2. PCL 3. Transverse 4. Posterior meniscofemoral
Name the bursae of the knee jiont
- Prepatellar
- Superficial infrapatellar
- Deep infrapatellar
- Suprapatellar
- Lateral gastrocnemius
- Medial gastrocnemius
- LCL
- Biceps femoris (lateral hamstring)
- IT
- Semimembranous (medial hamstring)
- Anserine
Name the tibiofilbular joints
- Superior tibiofibular
- Interosseous membrane
- Inferior tibiofibular
Name the ligaments of the superior tibiofibular joint
synovial hinge joint
- Anterior ligament of fibular head
- Posterior ligament of fibular head
Name the ligaments of the inferior tibiofibular joint
clamp joint - connects to ankle
- Anterior tibiofibular ligament
- Posterior tibiofibular ligament
When is the clamp (tibiofibular joint) loosened?
during plantar flexion - toes pointed downward
Name the ligaments of the talocrural joint
Upper 1. Anterior & posterior tibiofibular ligaments Lower 1. Lateral ligament - group of bands anterior & posterior talofibular bands calcaneofibular band 2. Medial ligament - 4 bands anterior & posterior tibiotalar band tibiocalcaneal band tibionavicular band
What is the most common ankle injury?
inversion sprain - lateral ligament
What is a high ankle sprain?
a twisted ankle
anterior & posterior tibiofibular ligaments (clamp)
What makes up the medial longitudinal arch?
- Tibialis posterior muscle
- Spring ligament
- Plantar fascia - maintains arch
What happens with acute stress on the arch?
ex. standing, running on concrete
- plantar fasciitis
can lead to bone spurs (calcaneal)
What happens with chronic stress on the arch?
ex. gradual wt gain, reduction of tibialis posterior contraction
- Pes planus - flat foot
leads to knee pain - anserine bursitis
What innervates the lower limbs?
- Lumbar plexus - L2-L4
2. Sacral plexus - L4-S4
Name the leads off the lumbar plexus
- Lateral femoral cutaneous nerve
- Femoral nerve
- Obturator nerve - anterior
Name the leads off the sacral plexus
- Superior gluteal
- Inferior gluteal
- Piriformis
- Posterior femoral cutaneous
- Sciatic
What does the lateral femoral cutaneous nerve innervate?
skin of lateral thigh
-posterior from lumbar plexus
What does the femoral nerve innervate?
skin & muscles of anterior thigh & medial 1/2 of calf=saphenous nerve
-posterior from lumbar plexus
What does the obturator nerve innervate?
Muscles & skin of medial thigh
-anterior from lumbar plexus
What nerves innervate the gluteal region?
- Superior gluteal
- Inferior gluteal
- Piriformis
What does the posterior femoral cutaneous nerve innervate?
skin of posterior thigh
What innervates the skin of the booty?
Cluneal nerves
from dorsal rami of T12-L3, S1-S3
Name the branches of the sciatic nerve
sciatic to 1. Tibial to medial & lateral plantar 2. Common peroneal to deep & superficial peroneal
What are the non-limb nerves from the sacral plexus?
1. Nerve to pelvic floor levator ani ischiococcygeus 2. Pudendal nerve rectum labia & scrotum erectile tissue
What arteries feed the adductor magnus?
perforating branches from deep femoral artery
What are the superficial veins of the leg?
- Dorsal venous arch
- Great saphenous
- Small saphenous
Deeps veins named after arteries
Vena comitantes below knee
Singular veins above knee
What muscles does the femoral nerve innervate?
- Pectineus
- Iliacus
- Sartorius
- Rectus femorus
- Vastus lateralis
- Vastus medialis
- Vastus intermedius
What muscles does the obturator nerve innervate?
- Adductor Longus
- Adductor Brevis
- Adductor Magnus (sciatic too)
- Gracilis
- Obturator externus
What muscles does the superior gluteal nerve innervate?
- Gluteus Medius
- Gluteus Minimus
- Tensor Fasciae Latae
Which muscles aid in dorsiflexion of the ankle?
- Tibialis anterior
- Extensor digitorum longus
- Extensor hallicus longus
- Fibularis tertius
Which muscles does the deep fibular nerve innervate?
- Tibialis anterior
- Extensor digitorum longus
- Extensor hallicus longus
- Fibularis tertius
- Extensor Hallicus Brevis
- Extensor Digitorum Brevis
Which muscles does the superficial fibular nerve innervate?
- Fibularis longus
2. Fibularis brevis
Which muscles attach to the calcaneus?
Via calcaneus tendon
- Gastrocnemius
- Soleus
- Plantaris
Which muscles does the tibial nerve innervate?
- Gastrocnemius
- Soleus
- Plantaris
- Popliteus
- Flexor Hallicus Longus
- Flexor Digitorum Longus
- Tibialis Posterior
Which muscles are involved in plantarflexion?
- Fibularis longus & brevis
- Gastrocne,ius
- Soleus
- Plantaris
What muscles does the lateral plantar nerve innervate?
- Abductor Digiti Minimi
- Quadratus Plantae
- Adductor Hallicus
- Flexor Digiti Minimi Brevis
- Plantar Interossei
- Dorsal Interossei
What nerves does the Medial Plantar Nerve innervate?
- Abductor Hallicus
- Flexor Digitorum Brevis
- Flexor Hallicus Brevis
Which muscle is innervated by the medial & lateral plantar nerves?
Lumbricals
Where is a common site for kidney stones in the ureters?
Where the iliac artery & vein bifurcate