The difference is semantic; the solar system is the collective identity of all bodies considered together as a whole, i.e., the Sun, planets, etc.; whereas the bodies would refer to each of those making up the solar system: the planet Neptune for example is "a" body in the solar system.
Bodies in the inner Solar System, like Mercury, Venus, Earth, and Mars, are predominantly made of rock and metals. In contrast, bodies in the outer Solar System, like Jupiter, Saturn, Uranus, and Neptune, are primarily composed of gases and ices, such as hydrogen, helium, water, and ammonia. Additionally, outer Solar System bodies are much larger and more massive compared to inner Solar System bodies.
The solar system
The various bodies in our Solar System are loosely connected by the force of gravity, with the Sun at its center.
A solar system.
Venus, Earth, Mars, and Triton (Neptune's largest moon) have carbon dioxide in their atmospheres.
Ganymede of Jupiter has atmospheres.
Mercury (22%), Jupiter (90%), Saturn (96%), Uranus (83%), and Neptune (80%) have mostly hydrogen gas in their atmospheres.
*This may be suspect to change Triton (Neptune's largest moon), Venus, Earth, and Mars.
The main bodies to have atmospheres that include carbon are, Venus, Earth, Mars, and Titan. Titan is a moon orbiting Saturn. The gas giants, Jupiter, Saturn, Uranus, and Neptune all have mainly hydrogen atmospheres.
Inside our solar system, only planet Earth has an atmosphere breathable to humans.
All except Mercury.
Uranus, Jupiter, Neptune and Saturn have the thickest atmospheres, as they are further away in the solar system. Earth, Mars, Venus and Jupiter are the closest in the solar system and therefore have the thinnest atmospheres.
One for sure is Titan.
There are various small bodies in the solar system .These include moon, asteroids, rocks etc.
Plenty of planets have atmospheres.
The difference is semantic; the solar system is the collective identity of all bodies considered together as a whole, i.e., the Sun, planets, etc.; whereas the bodies would refer to each of those making up the solar system: the planet Neptune for example is "a" body in the solar system.