The cytoplasm
placenta
vitreous humor
It is called a Cyst
Yup
mucus
Water is a thin fluid. Shampoo is a thick fluid.
The thick fluid inside the chloroplast is called stroma. It is where enzymes involved in the process of photosynthesis are located, and where the Calvin cycle takes place.
It is a thick liquid.
The plantar fascia is the thick connective tissue which supports the arch of the foot
This is called the seminal vesicle (actually there are two). The thick fluid is a sugar and protein mix.
a thick fluid inside chloroplasts
they are one cell thick.