The bladder divideS into two main parts, each with its own features: the upper part, above the ureteric orifices, is composed of the apex and body, while
the lower part is composed of the fundus, trigone, and neck
. The capacity of the bladder is about 500 mL in healthy individuals.
What is the general histological Organisation of the ureters and bladder?
There is a layer of smooth muscle outside the mucosa: The upper two-thirds has two layers of smooth muscle: inner longitudinally arranged, and outer circularly arranged. The lower third has three layers of smooth muscle; Inner longitudinal, middle circular, outer longitudinal.
How can you tell the difference between a ureter and a bladder histology?
The calyces, renal pelvis, ureter, and bladder have the same basic histological structure, with
the walls of the ureters becoming gradually thicker as proximity to the bladder increases
. The mucosa of these organs consists of transitional epithelium and a lamina propria of loose-to-dense connective tissue.
What kind of organization is bladder?
The
organ
level of organization is when two or more tissues work together for a specific function. For example, the bladder consists of an inner lining of epithelial tissue, bound by various connective tissues to (smooth) muscle.
What is the main epithelium of the ureter and bladder?
The bladder consists of several layers: The layer of cells that lines the inside of the kidneys, ureters, bladder, and urethra is called
the urothelium or transitional epithelium
. Cells that make up this layer are called urothelial cells or transitional cells.
Which tissue is present in ureter?
Ureter Structure and Function
The ureters are two tubes that are made out of
smooth muscle and transitional epithelial tissues
, which are a type of epithelial tissue that may either be columnar or squamous. Each kidney has its own ureter through which urine drains into.
What is the main function of ureter?
Two ureters.
These narrow tubes
carry urine from the kidneys to the bladder
. Muscles in the ureter walls continually tighten and relax forcing urine downward, away from the kidneys. If urine backs up, or is allowed to stand still, a kidney infection can develop.
What type of epithelium lines the urinary bladder and is capable of distention?
Transitional epithelium
is a type of stratified epithelium. This tissue consists of multiple layers of epithelial cells which can contract and expand in order to adapt to the degree of distension needed. Transitional epithelium lines the organs of the urinary system and is known here as urothelium.
What type of epithelium would you expect to find lining the urinary bladder and why?
Unlike the mucosa of other hollow organs, the urinary bladder is lined with
transitional epithelial tissue
that is able to stretch significantly to accommodate large volumes of urine. The transitional epithelium also provides protection to the underlying tissues from acidic or alkaline urine.
What is functionally important about the epithelium lining the bladder?
Stratified transitional epithelium
lines the urinary bladder, allowing this organ to stretch then return to its original shape.
What are the six levels of organization?
independent individual. Summarizing: The major levels of organization in the body, from the simplest to the most complex are:
atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism
.
What are the five levels of organization in our bodies from smallest to largest?
It is convenient to consider the structures of the body in terms of fundamental levels of organization that increase in complexity, such as (from smallest to largest): chemicals, cells, tissues, organs, organ systems, and an organism.
What is the largest level of organization?
The highest level of organization for living things is
the biosphere
; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
What’s the difference between a ureter and a urethra?
The ureter is a small tube, or duct, that connects the bladder and kidneys. Urine passes through the ureter from the kidneys to the bladder. The urethra is the tubular path that connects the bladder to the body’s exterior, allowing urine to exit the body.
How many layers does the ureter have?
The ureter is made up of
3 layers
: innermost mucosa, muscularis, and the outer adventitia. The mucosa is lined with circular transitional epithelium. The keratin in this layer is responsible for the waterproof propereties.
What do the ureters do seer?
The ureters
carry the urine away from kidneys to the urinary bladder
, which is a temporary reservoir for the urine. The urethra is a tubular structure that carries the urine from the urinary bladder to the outside.
