endospore
I believe that you are referring to a bacterial endospore. Only a small number of bacteria can produce these (Gram-positive Firmicutes). Endospores are very tough and allow the bacteria that can produce them to survive high temperatures, pressures, drought, etc.
oospore
Lame's theory is typically used for analyzing thick-walled cylinders, where the ratio of inner to outer radius is significant (typically less than 10). For thin-walled cylinders, where the thickness is very small compared to the radius, a simpler approach like the thin-walled cylinder theory or membrane analogy is more appropriate.
Spores or Endospores.
The thick-walled structure in bacteria that contains the chromosome and a small amount of cytoplasm is called an endospore. Endospores are formed under stressful conditions such as nutrient deprivation to protect the bacterial DNA and ensure survival.
An akinete is a dormant, thick-walled resting cell formed by certain species of cyanobacteria. They allow the organism to survive unfavorable environmental conditions such as extreme temperatures or nutrient depletion. When conditions become favorable again, akinetes can germinate and resume normal metabolic activity.
they are the ventricles
true
Zymase is an enzyme. It is a complex of enzymes responsible for the fermentation of sugars into alcohol and carbon dioxide, typically found in yeast. It is not a thick-walled spore.
that obviously depends on allot of things but .1 in thick walled to 1/8 in walled is the most optimal.
Muscular arteries
an artery