Which structures are responsible for lipid synthesis in plants and animal cells respectively?

In plants, lipid synthesis occurs primarily in sphaerosomes, which are organelles with a single half-unit membrane that produce and store lipids. They originate from the endoplasmic reticulum. In animal cells, lipid synthesis mainly occurs in the smooth endoplasmic reticulum (SER), which is devoid of ribosomes and responsible for lipid synthesis, detoxification, and steroid synthesis.