Question

types of bone cells
osteoblasts and osteocytes
(04:30 - 05:51) osteoblasts are cells that make _. they can mature into another type of cells called _. these cells maintain bone _ and make up the majority of bone cells present.
osteoclasts
osteoclasts break down _ structure. osteoclasts have a lot of _. in lysosomes, there are enzymes and acids that can help _ bone.
the body is always responding to stresses and some parts of _ bone is removed, and some parts are rebuilt in bone remodeling, so osteoclasts are needed for this _ process. every year, approximately _ - 10% of a skeleton is remodeled. remodeling in the skeletal system means bone has been _ or is just old and reabsorbed and replaced. the process of breaking down bone also releases _ the body may require. a major mineral bones store is _. calcium has a lot of _ for your body processes.
cartilage and bone growth
(05:52 - 06:45) chondroblasts can mature into chondrocytes which maintain this _. cartilage supports bone, and is important in joints where bones are _. in fetal development, it is cartilage, made by chondroblasts, that is meant to serve as the _ for the bones. eventually bone will replace most, but _ all of the cartilage matrix. with the help of osteoblasts, bones grow in length until _. bones can also grow in diameter even if they _ growing in length.
pause from 06:40 - 06:45 and draw the growth plate zones

Explanation:

Osteoblasts make bone matrix and can mature into osteocytes which maintain bone structure. Osteoclasts break down bone structure with lysosomal enzymes and acids. Bone remodeling occurs as the body responds to stresses, with about 10% of the skeleton remodeled each year. Bone stores calcium which is released as needed. Chondroblasts can mature into chondrocytes, cartilage supports bone in joints and is a precursor to bone in fetal development. Bones grow in length until adulthood with the help of osteoblasts and can grow in diameter even if length - growth stops.

Answer:

(04:30 - 05:51) Osteoblasts are cells that make bone matrix. They can mature into another type of cells called osteocytes. These cells maintain bone structure and make up the majority of bone cells present.
Osteoclasts break down bone structure. Osteoclasts have a lot of lysosomes. In lysosomes, there are enzymes and acids that can help break down bone.
The body is always responding to stresses and some parts of bone is removed, and some parts are rebuilt in bone remodeling, so osteoclasts are needed for this remodeling process. Every year, approximately 10% of a skeleton is remodeled. Remodeling in the skeletal system means bone has been broken down or is just old and reabsorbed and replaced. The process of breaking down bone also releases calcium. A major mineral bones store is calcium. Calcium has a lot of functions for your body processes.
(05:52 - 06:45) Chondroblasts can mature into chondrocytes which maintain this cartilage. Cartilage supports bone, and is important in joints where bones are connected. In fetal development, it is cartilage, made by chondroblasts, that is meant to serve as the precursor for the bones. Eventually bone will replace most, but not all of the cartilage matrix. With the help of osteoblasts, bones grow in length until adulthood. Bones can also grow in diameter even if they stop growing in length.